Can a WD Application Know Its Portal Navigation Location?

Hi,

I'm interested in a web dynpro component being able to tell under what role it is running in the portal.

Let's say a web dynpro iview is available under two portal roles-- Role 1 and Role 2. Is there a way for the web dynpro component to determine if it is running under Role 1 or Role 2?

I've looked through IF_WD_PORTAL_INTEGRATION and its implementing class CL_WDR_PORTAL_INTEGRATION. Though the class does have several GET_JS_CALL_* methods which call EPCM functions, I don't see anything for identifying top-level navigation location

Any ideas for how to achieve this?

Cheers,

Amy