One ticket for more than one customer portal user

One ticket for more than one customer portal user

I would like to know if it is possible to assign a new ticket/request created by an agent support to an account in a way that all contacts of that account is able to see that ticket/request accessing his/her own user id in customer portal. Or in other words, if there is a way to allow more than one customer portal user of the same account (our customer) to see a specific ticket.
Thank you in advance.