[otrs] Company Tickets

Hi, we are using OTRS 1.3.2 and I want to enable the company ticket feature for the customer web frontend. I was told that tickets with the same CustomerUserID (e.g. company.org) will be displayed as company tickets and tickets with the same CustomerID (e.g. customer@company.org) will be displayed as myTickets. At the moment both are the same by default: customer@company.org But how usually the CustomerUserID of future (and old) tickets can be changed to be e.g. company.org, so that in future the company members can see all their tickets under "company ticket" ? Thank you for your help, Sven