Realms and authorization/authentication

[Paulo Lima]

Hi,   I am having difficulties to find a way to configure freeradius (0.3) for the following application:   3 realms (isp1.com, isp2.com and isp3.com), using ldap, for each ISP I would need to use a different LDAP server.   I can configure different instances of the LDAP module using ldap ISP1 { ...} and so on, each instance can have a different server assigned, however I could not find a way that authorize would use the different ldap instance according to the realm.   If I just do a sequential search through all ldap instance I run into a problem where the same username can be used on the different ISPs.   Does anybory now a way to configure such an application using freeradius?