[otrs] Filtering tickets

Hi, I'm using latest version of OTRS and have problem filtering tickets created using customer web interface. What I'm trying to get is: a) customer can pick only one queue from to field (it's a parent queue of all other queues), and tickets are then filtered into correspoding queue associatied with user/group *or* b) customer can pick/see only queue associated to his account/group and tickets are filtered according to that. Right now, using web interface, users can see only parent queue, but all tickets are going to that parent queue not sub-queues associated with user/group. If users create new ticket by sending mail, tickets are filtered correctly according to settings in PostMaster filter. Thanks.