[drupal-support] categories "block"

[Abalieno]

I use a default block/feature to display a block on the sitebar with all the 
categories listed.

The problem is that also the forums are based on the categories system and 
I'd like to keep them detached. In the block I'd like to show only the 
categories of the main content of the site and not also all the categories 
that I build for the forums.

There's a way to do this?

-HRose / Abalieno