diff --git a/plugins/post_analysis/filter_users.py b/plugins/post_analysis/filter_users.py
index 048db1e..682ce8f 100644
--- a/plugins/post_analysis/filter_users.py
+++ b/plugins/post_analysis/filter_users.py
@@ -37,8 +37,8 @@ Conf values needed :
     filtered_ip : list of ip (string)
     create_filtered_page*
 
-Filter is a list of filter description combined by AND operator
-Filter description is a list of 3 elements :
+Filter can be a function or a list of filter description combined by AND operator
+Filter description can be a function or a list of 3 elements :
 
   * Field to match in visits
   * Operator '=', '==', '!=', '>', '>=', '<', '<=' for int value
@@ -47,6 +47,19 @@ Filter description is a list of 3 elements :
 
 For easiest config, you can indicate both 'remote_addr' or 'ip' in field element
 
+function prototype is func(iwla, hit) and must return True or False
+
+Example :
+
+def my_filter(iwla, hit):
+    return True
+
+filtered_users = [
+    [['viewed_pages', '>=', '5'], ['viewed_hits', '>=', '5']],
+    [['viewed_hits', '>=', '5'], my_filter],
+    my_filter,
+]
+
 Output files :
     None
 
@@ -91,8 +104,14 @@ class IWLAPostAnalysisFilterUsers(IPlugin):
         self.filters = self.iwla.getConfValue('filtered_users', [])
         self.ip_filters = self.iwla.getConfValue('filtered_ip', [])
         for _filter in self.filters:
-            for sub_filter in _filter:
-                self._check_filter(sub_filter)
+            if type(_filter) == list:
+                for sub_filter in _filter:
+                    if not callable(sub_filter):
+                        self._check_filter(sub_filter)
+            elif callable(_filter):
+                continue
+            else:
+                raise Exception(f'Invalid filter {_filter}')
         return True
     
     def __do_filter(self, hit, _filter):
@@ -124,9 +143,18 @@ class IWLAPostAnalysisFilterUsers(IPlugin):
             return True
         
         for _filter in self.filters:
+            if callable(_filter):
+                if _filter(self.iwla, hits[ip]):
+                    return True
+                continue
+            # Must match all sub filters
             filtered = True
             for sub_filter in _filter:
-                if not self.__do_filter(hits[ip], sub_filter):
+                if callable(sub_filter):
+                    if not sub_filter(self.iwla, hits[ip]):
+                        filtered = False
+                        break
+                elif not self.__do_filter(hits[ip], sub_filter):
                     filtered = False
                     break
             if filtered:
@@ -134,6 +162,9 @@ class IWLAPostAnalysisFilterUsers(IPlugin):
         return False
     
     def hook(self):
+        if not len(self.filters) and not len(self.ip_filters):
+            return
+
         hits = self.iwla.getValidVisitors()
 
         if len(self.filters) or len(self.ip_filters):