diff --git a/acto/post_process/filter_dup_alarm.py b/acto/post_process/filter_dup_alarm.py
new file mode 100644
index 0000000000..84c4df40e5
--- /dev/null
+++ b/acto/post_process/filter_dup_alarm.py
@@ -0,0 +1,136 @@
+import argparse
+import json
+import pydantic
+import yaml
+import sys
+import re
+import os
+import pandas as pd
+
+from typing import Optional, List, Any
+
+from acto.post_process.post_process import PostProcessor
+from acto.lib.operator_config import OperatorConfig
+from acto.utils.thread_logger import get_thread_logger
+from acto.common import Diff
+from acto.result import ConsistencyOracleResult
+
+logger = get_thread_logger(with_prefix=False)
+
+
+class Bug(pydantic.BaseModel):
+    """
+    Class for resolving user-defined deduplicate alarm config file
+    """
+    name: Optional[str] = pydantic.Field(description="Name of the bug")
+    properties: List[Any] = pydantic.Field(
+        description="Regex patterns for properties to consider in deduplication"
+    )
+    prev: Any = pydantic.Field(description="Previous value")
+    curr: Any = pydantic.Field(description="Current value")
+
+    @classmethod
+    def load(cls, file_path: str) -> "Bug":
+        """
+        deserialize Bug object from filter file
+        """
+        try:
+            with open(file_path, "r", encoding="utf-8") as file:
+                yaml_data = yaml.safe_load(file)['bug']
+                return cls(**yaml_data)
+        except FileNotFoundError:
+            raise ValueError(f"File not found: {file_path}")
+        except yaml.YAMLError as e:
+            raise ValueError(f"Failed to parse YAML: {e}")
+
+
+class FilterTestResult(PostProcessor):
+    def __init__(self, testrun_dir: str, config: OperatorConfig):
+        super().__init__(testrun_dir, config)
+
+    def post_process(self, filter_file: str, output_path: str):
+        bug = Bug.load(filter_file)
+        self.filter_by_fields(bug, output_path)
+
+    def compare(self, bug: Bug, diff: Diff) -> bool:
+        """Compare Bug properties with Diff path and prev/curr values"""
+        # convert Diff.path to string to compare
+        diff_path = '.'.join(map(str, diff.path.path))
+        # check prev and curr variable type
+        if type(bug.prev) != type(diff.prev) or type(bug.curr) != type(diff.curr):
+            return False
+        # check the properties match
+        if re.match(str(bug.prev), str(diff.prev)) and re.match(str(bug.curr), str(diff.curr)):
+            for pattern in bug.properties:
+                if re.search(pattern, diff_path):
+                    return True
+        return False
+
+    def filter_by_fields(self, bug: Bug, output_path: str):
+        duplicate_alarms = []
+        for trial in self.trial_to_steps.values():
+            for step in trial.steps.values():
+                # extract the input diff for each step
+                consistency_result = step.run_result.oracle_result.consistency
+                if not isinstance(consistency_result, ConsistencyOracleResult):
+                    continue
+                # use regex to compare input_diff with the user-defined bug
+                input_diff = consistency_result.input_diff
+                if not self.compare(bug, input_diff):
+                    continue
+                # dump csv for duplicate alarms, maybe replace with change the self.trail_to_steps and then use dump_csv
+                is_alarm = (
+                        not step.run_result.is_invalid_input()
+                        and step.run_result.oracle_result.is_error()
+                )
+                duplicate_alarms.append(
+                    {
+                        "Trial number": str(step.run_result.step_id),
+                        "Testcase": json.dumps(step.run_result.testcase),
+                        "Alarm": is_alarm,
+                        "Crash": step.run_result.oracle_result.crash,
+                        "Health": step.run_result.oracle_result.health,
+                        "Operator log": step.run_result.oracle_result.operator_log,
+                        "Consistency": step.run_result.oracle_result.consistency,
+                        "Differential": str(
+                            step.run_result.oracle_result.differential
+                        ),
+                        "Custom": step.run_result.oracle_result.custom,
+                    }
+                )
+        duplicate_results_df = pd.DataFrame(duplicate_alarms)
+        if len(duplicate_results_df) != 0:
+            duplicate_results_df = duplicate_results_df.sort_values(by=["Trial number"])
+        duplicate_results_df.to_csv(output_path, index=False)
+
+
+def main():
+    """Main entry point."""
+    parser = argparse.ArgumentParser(
+        description="Collect all test results into a CSV file for analysis."
+    )
+    parser.add_argument(
+        "--config",
+        type=str,
+        required=True,
+        help="Path to the operator config file",
+    )
+    parser.add_argument(
+        "--testrun-dir", type=str, required=True, help="Path to the testrun dir"
+    )
+    parser.add_argument(
+        "--filter", type=str, required=True, help="Path to the results filter file"
+    )
+    args = parser.parse_args()
+
+    with open(args.config, "r", encoding="utf-8") as config_file:
+        config = OperatorConfig.model_validate(json.load(config_file))
+    post_processor = FilterTestResult(
+        args.testrun_dir,
+        config
+    )
+    post_processor.post_process(args.filter, os.path.join(args.testrun_dir, "dup_results.csv"))
+
+
+if __name__ == "__main__":
+    main()