[Dovecot] Log the virtual email address and not the local account - dovecot 1.2.2 w/ MySQL

I recently started using dovecot and have it working well but I have one item I haven't been able to find an answer for. I am using MySQL with Dovecot for authentication with my virtual email customers. When the user logs in and checks email a log entry is recorded. Instead of the email address (bob@bob.net) being logged it records the local account (vemail101) in the POP3 log. How can I get dovecot to reflect the email address that the customer logged in with instead of the local account?

Thx,

Bill