[AccessD] Using Citrix Logins In Access

I have a client who uses Citrix to gain access to a server to run 
various software on including my database.  I would like to be able 
to use the Citrix login information in my Access database to 
determine who can do what (as opposed to having the users logging 
into my software as well as Citrix).

In SQL I have used: SET @CurrUser = SYSTEM_USER

Is there an equivalent command from within Access?

How have others dealt with this?


Regards

David Emerson
Dalyn Software Ltd
Wellington, New Zealand