Index: trunk/core/units/general/cat_tag_processor.php
===================================================================
diff -u -N -r8734 -r8757
--- trunk/core/units/general/cat_tag_processor.php	(.../cat_tag_processor.php)	(revision 8734)
+++ trunk/core/units/general/cat_tag_processor.php	(.../cat_tag_processor.php)	(revision 8757)
@@ -212,11 +212,19 @@
 
 			$params['raise_warnings'] = 0;
 			$object =& $this->getObject($params);
-			/* @var $object kDBItem */
+			/* @var $object kCatDBItem */
 
+			// 1. category restriction
 			$params['cat_id'] = $object->isLoaded() ? $object->GetDBField('ParentPath') : $this->Application->GetVar('m_cat_id');
 
-			return $perm_helper->TagPermissionCheck($params, $this->getPrefixSpecial().'_HasPermission');
+			// 2. owner restriction
+			$owner_field = $this->Application->getUnitOption($this->Prefix, 'OwnerField');
+			if (!$owner_field) {
+				$owner_field = 'CreatedById';
+			}
+			$is_owner = $object->GetDBField($owner_field) == $this->Application->RecallVar('user_id');
+
+			return $perm_helper->TagPermissionCheck($params, $is_owner);
 		}
 
 		/**