with the KIX4OTRS (free and Open Source package of extensions compatble with the OTRS), you can easily do it.When the CIs and a customer are matched, then you see the user-related CIs within the ticket view. Additionally, within the customer search you see automatically the related CIs as well after you select a customer.If you need more information about it or screenshots, contact us. You can download KIX and try it, of course, too: