libapache2-mod-authz-unixgroup 1.0.1+svn67-1ubuntu0.1 (sparc binary) in ubuntu karmic

 Mod_Authz_Unixgroup is a unix group access control module for Apache 2.1 and
 later. If you are having users authenticate with real Unix login ID over the
 net, using something like my mod_authnz_external / pwauth combination, and
 you want to do access control based on unix group membership, then
 mod_authz_unixgroup is exactly what you need.
 .
 This Package includes the mod-authn-unixgroup Module for Apache Version 2.2