Selectively style user-group postbit content

[faultymoose]

I have successfully figured out how to style admin content differently from registered member content, using a simple <vb:if condition="is_member_of($post, 6)"> statement.

What I would like to do is extend that to edit notes, so that if a post was edited by admin the edit note would receive the same styling.

Is there a variable I can replace $post with that will check the usergroup id of the editor?

--------------- Added [DATE]1358290413[/DATE] at [TIME]1358290413[/TIME] ---------------

Sorry I should add that I'm using postbit_legacy.