Multiple connections/roles on same machine for same site?

["lucapac" <webforumsuser@xxxxxxxxxxxxxx>]

As a Contribute CS3 Administrator (newbie; just converted a Dreamweaver site to 
work with Contribute), can I set up multiple connections to the same site?   I 
want to test the Publisher role and Writer role on my development machine 
before creating connnection keys for these roles for the customer who owns the 
site (and is waiting with new Contribute licenses and eager but idle staff)?  

 I just want to be able to test my site under these roles (using different 
passwords and username/email addresses), but there seems no obvious way to do 
this as Contribute seems to allow me to set up only one connection per URL, and 
also seems to want to wipe out my existing Admin connection if I come on in 
another role (from a connection key generated for a Publisher or Writer role).