Jan,

What do you mean by "default email address"? If you have two addresses associated with a user, neither will be default. Live monitor will display the address used as the recipient in the email. For example, if you have jan@yourcompany.com and jan.irby@yourcompany.com, a sender on the Internet can send emails to either one of them and you will see the actual address used in the email displayed in Live Monitor.

Let me know if I miunderstood your question.