[Mediawiki-l] Page access restiction

[Matthias Hirsch-Hoffmann]

Hi all wikianers

My Newbie-Question on a Wiki 1.5 System:
I have two groups, G1 and G2 with users.
I want to set the permission as follow:
All users can read all pages, created by users of G1 and G2.
Only users of G1 can edit pages created by users of G1
and only users of G2 can edit pages created by users of G2.

Is there a way?

Thanks for your help.
Regards
Matthias Hirsch-Hoffmann
ETH Zurich (Switzerland)
mhh at ethz dot ch