Who's Online showing mods, supermods and admins only
 

Is there a way for the 'who's online' section to show mods, admins and supermods who are online ONLY?

We've got quite a big board, so we've currently got 'who's online' switched off to help keep our server speed good. But it would be really useful if we could include the 'who's online' facility to just show those three usergroups.

Anybody know how to do that?