pam_group

Enable group assignment

$ auth required pam_group.so

$ echo "* ; * ; * ; Al0000-2400 ; audio" >> /etc/security/group.conf

pam_group.so

pam_group assigns supplementary groups at login. Time and terminal based.
The module adds groups conditionally. Configured via group.conf.

Configuration in /etc/security/group.conf:
Format: services ; ttys ; users ; times ; groups

Requires group.conf. Auth stack only. Groups added per-session.

pam_group provides conditional group assignment based on login context.

pam(8), group.conf(5)