AD Imported users - can't tell which domain they came from

The AD user import function works great. However, after importing users from two domains, I don't see a way to tell which domain the user came from. My issue is I'm ready to turn a few requestors into technicians, but these folks have accounts in both domains and I'm not sure if the account shown is for one domain or the other. Their account names are the same in both domains. I'm not sure why we only have a one-way trust, but I'm working on that so the accounts in the other domain can be eliminated. Until then, I need to make sure I'm turning the corret accounts into Technicians. It doesn't look like SDPlus allows for the same account name for more than one domain as these folks only show up once after performing imports for both domains.

Ideas?