pam_group support NIS netgroups to assign (local) group to (indeed)
netgroups.
But today NIS setup are really uncommon, and enable the NIS netgroup
''layer'' (objectclasses) and stuffs in LDAP only to manage this...
Please, consider patching pam_group debian package to include support
for NSS group.
Googling around i've found these patches (that seems to me the same):
https://bugs.launchpad.net/ubuntu/+source/pam/+bug/297408
http://www.redhat.com/archives/pam-list/2009-December/msg00000.html
Thanks.
Added this feature to CVS.