[otrs] automatics movement to special queries

Hello, we try OTRS as our helpdesk system, it looks like tool what we need. We created some queues with central one.All request are at first in this central one and then someone must manually move tickets from this central queue to another e.g HW. I can imagine that in subject of incomming mail will be string HW (if it is for HW query) , or somethink like this. How can I do it? Helpdesk email address is not on this server, OTRS is connecting to POP3 account for helpdesk. Thank you. Josef Berger