[PERDITION-USERS] Problem selecting Imap based on Ldap information!

Hi! I'm looking into perdition for a small case we have. We would like to use perdition as a frontend for IMAP and only IMAP to choose between two system based on information in a OpenLdap database. The information is in a object called "mailrouteaddress" and can be one of two user(a)box.domain.com or user(a)xob.domain.com Hence I don't have an object just containing the systename. Is there a way to parse the domainname from the object above? (In pop I could use popmap I guess but I only need this for IMAP). Regards /Mats