[Serusers] multiple SER instances / REGISTRATION problem

I'd like to run multiple SER instances on the same database. I knew from previous experiments that would not be possible because of the cache. However, I just tried running multiple SER instances, on the same database, but in different domains. This did not work, they both wrote over each others location entries in the database even though the domains on each SER instance were different. SER knows which domain it is in because of the www_authorize("named.com", "subscriber") authentication challenge. So it seems reasonable that this instance of SER should only mess with authorizations that it challenged. Perhaps the problem is with the initial load of 'previous' registrations. When SER starts, it loads the current location table. During the load, ALL domains are loaded. Perhaps only the domains listed by the 'alias="domain"' should be loaded and tracked, and all of the rest should be ignored for each instance of SER? ---greg