If moderator of forum, etc etc

[CoffeeLovesYou]

Hello,
I have a quick question about an if conditional.
I know a forum that has moderators of individual categories. Here's an example.
There's a Music category, and a Television category. Jimmy is a moderator of the Music category, so when he posts in the Music category, his name shows up in a Green color (or any color). Now, there's Bob, who is a moderator of the Television category. When he posts in the Television category, his name also shows up Green (or any other color). Now, if Bob posts in the Music Area, or vice-versa, their name will not show up green because they aren't a moderator of that particular forum.

I am trying this code;

<if condition="can_moderate($forum['forumid'])">
stuff here
</if>

However, what is happening is.. every person is getting the "stuff here" part! I don't think the can_moderate condition is working. I am trying to use it in my postbit template. There are users who aren't a moderator of the current forum they posted in, and it shows the code i put in the if conditional in their post.