[Fedora-directory-users] roleOccupant in ACI

I am in the process of migrating ACLs from OpenLDAP to ACIs in FDS. I'm having trouble figuring out how to best convert from "group/organizationalRole/roleOccupant" bind rules to a comparable method in the Fedora Directory Server. Do I need to move the roleOccupant entries to uniquemember entries (which would require objectClass changes as well) then use a groupDN bind rule? I would rather not change the data. Is it possible to have the groupDN bind rule use an attribute other than uniquemember? Any help/thoughts would be appreciated.