I use Role Manager plugin. Is there some plugin that could restrict access to categories based on user permissions / user role? There are many 'almost-fit' plugins, but no one of them could make such access list based on 'groups' user belongs, not per-user.
I'll list here those i found:
Some I missed? Already thinking about write yet another such beast..
BTW, AFAIC figure, such plugin (with some additional features or another plugins) could easily fulfill "WordPress-based Forum" niche -- most needed functionality WP has already, only few pieces is missing.