Criteria based group membership xPath

Hi'

I wan't to create a group, where the members are the one who has the same value in Description as the Group has in Displayname.

Pseudo: Person where Description Eq Group Displayname

/Person[(DisplayName = '%ObjectID%/Displayname')]   <-- is not right, but can it even be done? Is %ObjectID% only available for RCDC or is it possible to use in Set / Group membership criteria?

/Frederik Leed