Hi, I am sorry, but I don't know which accounts you are talking about. And I can't make the connection between some accounts and this section of the UBB. Please be a bit more specific, and I'll try to help you.
The only posibility is making a backup and importing it into the other firewall, then re-changing the host specific values. In other words - no, not really, at least none that I know of. For that purpose, you might better switch to another authentication mechanism. Questions regarding that should be directed to the Secure Remote Access board.