How do I assign different Edit timing to different groups?

[fiver]

I have 1.1b3p installed.

How do I assign different Edit  timing to different groups?

Eg.
Those with 1-10 posts cannot edit.
Those with 10 posts will have 10 mins to edit.
Those with 60+ post will have 60 mins to edit.
and maybe, those with 1000+ post will have no time limit.

Thks.