There is a feature planned which is called "custom queues". Unfortunately it is not yet included and there is no ETA when it will be included in osTicket, so for now you will have to mod the source code yourself. Therefore take a look at the following discussions:
http://forum.osticket.com/d/discussion//a-better-ticket-list#latest
http://forum.osticket.com/d/discussion//append-a-created-ticket-status-form-field-to-an-already-existing-column-in-the-main-ticket-view#latest