User blog comment:DaNASCAT/Introducing New Moderator Opportunities For Community Administration/@comment-4234382-20160119003554/@comment-4234382-20160120011246

I just added it to an account on the Mugen Souls wiki so it must of been activated since you posted. Also I note that unlike discussion moderator or admin, there's no indication that a user is a content manager group except if you check in ListUsers.