[Jawelin]

Just a tip:
what about
1) choose a forum from a combo-list (best ordered the same way in jump-combo is, not alphabetically), fixing a parameter, this way.
2) seek all the user table checking :

PHP Code:

                 $permissions=getpermissions($forum[forumid],$userid);
                 if ($permissions['canview'] == 1/0 ) {
                   // add this user to the enabled/disabled list
                 } 


The complexity should be linear than the usercount, and this way the search should keep the inheritance, the access table, the usergroup permission, etc.

???

Thanks, FF.