Can the Agents open ticket only for specific CustomerCompany?

[ciotola]

Hello to All,
this is our scenario :
- One OTRS4 environment with several CustomerCompany and different logical Service Desk.
- We have build a Queue Hierarchy that reflect the virtual Service Desk Organization
Company-1
|------- Queue Company 1 SPOC
|--------------Queue 1
|--------------Queue 2
|--------------Queue 2.1

Company-2
|------- Queue Company 1 SPOC
|--------------Queue 1
|--------------Queue 2
|--------------Queue 2.1


- With the Role mechanism we have configured all our Agent in the system with right on specific Queue three
Role Company-1 can work on ticket in Queue Company 1
Role Company-2 can work on ticket in Queue Company 2
... and so on

- CustomerUser are associated to a Specific CustomerID (Company) and have theyr own Group/ Services/ SlA Associated

- When an Agent create a new ticket (from AgentTicketPhone) he can see in the Customer Selection all the Customer in the system (we suppose that this is the normal OTRS Behaviour)

The question: Is there any way for apply/build a filter (based on CustomerID /Service /Group) for show only the customerUser on which the Agent can open ticket?

Tanks for your support/suggestion

Regards,
Giampiero