As per the documentation in django_auth_ldap at http://pythonhosted.org/django-auth-ldap/reference.html#std:setting-AUTH_LDAP_REQUIRE_GROUP
AUTH_LDAP_REQUIRE_GROUP can be used to configure the distinguished name of a group; authentication will fail for any user that does not belong to this group.
Is it possible to set multiple groups against which the user can be authenticated? instead of just one?