SNMP++ same user, different password

Question

I'm using SNMP++ for a monitoring project. It seems if I set the same user on different boxes, with different passwords, SNMP++ tries to pull the one of the passwords out of the USM table to use on both servers.I was going to use the localized users, but you would have to do discovery first to get the engineId. Any ideas on how to get it to do host specific usernames/passwords?