Is it possible to have two different users (with different permission sets) logged into the same MMC instance of GPOADmin?
You can log in a second time by right-clicking the "GPOADmin" entry in the upper left, and choosing "Connect to...".
This will create a second collapsible entry under the already existing connection, that can be switched through freely.
However, editing a GPO will be restricted to the "Run As" user who launched GPOADmin.
