This module lacks the ability to specify the visibility scope of groups as implemented in ejabberd2 module mod_shared_roster.
For example, groups_file contains
where after group name may be list of groups that are visible for the current group. Desirable to also have been implemented macros like @all@ for all shared groups.
Thanks for your request. This is something we have on the roadmap, see the related issue #167 for more information.