Not if the provider implements delegation properly. The identity string returned should be http://jerf.org in this case.

The catch, however, is that many providers screw the identity up. For example I set up a page at http://foo.com with necessary headers to delegate to my Google Account. Using the OpenID support on App Engine, I get the federated identity as http://foo.com/openid?id=[SOME RANDOM DIGITS] instead.

The idea of OpenID and delegation is awesome. In reality the millions different implementations fked up the whole thing, not even to mention the control and reliability issues.