Different User-Names in Frontend and Backend-Server

Hi all,

I know that the communication between frontend and backend-server is done via Trusted-RFC, which implies that the user-names must be the same on both systems.

However, what if the user name on the frontend-server differs from the user name in the backend-server?

Is there any solution for this? What about the "User-alias", can this somehow be used?

Thanks in advance

Oliver