Is there a way to use custom Authentication Plugins in OAM 11gR2 with a federated Partner?

Hi All,

I'm trying to find a way to force a user to still go through some logic that is contained within a custom AuthN plugin for OAM11gR2 even After the user has already authenticated with a third party IDP that is a federated partner to OAM. Because of the federation, OAM only checks the user UID from the IDP against OAM's identity store. OAM will not go through the custom AuthN plugin. Due to the limitations on OAM's AuthZ policies, I cannot move the logic from the custom AuthN plugin to the AuthZ policies. Is there a way for me to