[PERDITION-USERS] decide backend based on user realm

Hello List, I have several mail realms under my command (example1.net example2.net etc). Now I would like to use Perdition to set up a imap/pop3 proxy with it. Is it possible that Perdition switches the backend (real imap/pop3) server depending on the ralm the user authenticates with? For example, if the user sends a login like "user1(a)example1.net".net", then perdition redirects the auth info (imap or pop3) to mail.example1.net and if the user sends login "user1(a)example2.net" then perdition redirects to mail.example2.net? Thanks for any advice, bye Stefan