one "user" with multiple domains ?

Hi

i search and read the docs for this answer mayby im just blind ;)

Lets say i have customer that has 3 domains polle.se polle.com polle.net and i create a V-pro for the customer

Can the customer add a new mail account like lets say DD@polle.se can V-pro be configured so it auto adds DD@polle.com DD@polle.net to that account or does the customer have have 3 V-Pro and create 3 sepret account and make a forward

Sorry for the extremly bad spelling but its 2am and im dead tired