Yes, I have found it few minutes after I have write post, thanks.
@Karamraed in Module Manager use Filter for Position and choose "js_side_frontpage" - than you will see all modules which are shown in "frontpage" jomsocial view.
Second, JomSocial uses also standard type of modules which will have ":: None :: " position after installation.
p.s.
For Geeks, those names are "hidden" in database in two separate locations : PREFIX_modules and PREFIX_extensions