RestrictPostSaveParticipant to subset of Project Areas?

Hello World,

I have a IWorkItemPostSaveParticipant plugin that I only want to invoke in a subset of Project Areas? I know that with a OperationParticipant plugin I can configure which Project Area's to have it run, but IWorkItemPostSaveParticipant plugins seem to be global to the server.

Is there a best practice for configuring a IWorkItemPostSaveParticipant plugin to only execute for workitems associated with a specific set of Project Areas?

Thanks,