[otrs] Client ID and Access to tickets

Hello, I'm using Company tickets button and it's working perfectly. How may i let for one user see all company tickets composed by his colleagues, but at the same time provide no access for colleagues to see his tickets? I tried to leave all of customer ID's which needs to be seen in CustomersIDs field of this user, which must have full access to all tickets and delete it's ID from every colleagues CustomersIDs fields. After this nobody could see any tickets, "Company tickets" doesnt work. thanks a lot -- Matas