[Dovecot] Kerberos Cross-Real username

Hi List,

Is anyone is running Dovecot with Kerberos and tried to authenticate 

user from different REALM and have same user principal with default domain. Currently Dovecot only logs user principal w/o REALM. So before I go in production maybe somebody already run into this using Dovecot? If not I just create virtual machines and see how it behaves.