If condition - Hmm

[trance nation]

<if condition="$show['member']">

That code shows thing if the person is a member right? What if i want it to show it to them if they are in:

A) A certain user group
B) Have X amount of posts
C) Have been with the forum for one month +

I would prefer c and b but if it's possible to do this it owuld be great.

Thanks Trance