It doesn't support usergroup level control.
However, one user developed a modification to allow it.
See their post.

works fine also with 4.1.1 :)

awesome mod!
works with 4.1.4 pl2 :)

i am sorry guys

just want to make sure for users that using vbseo, almost all of us already set nofollow for external links in vbseocp, so do we still need this vBSEO Conditional Signatures mod or not? as its looks like have same way and purpose

its looks like if you already installing vbseo and set nofollow for external links in vbseocp you dont need this mod again

how about that

@basketmen, enter to a thread in your forum, view the source and look for nofollow in signatures links.
if you already have -> you don't need this mod.

if you don't know how to do it, just leave here (or in a pm) a link to a thread in your forum.