Lync Stress & Performance tool issue

Hi,

Our partner is testing a recording application for one of our customers, and while using the Microsoft Lync Stress & Performance tool they encountered the issue below:

"We will require that  Microsoft Lync Stress & Performance support to register each Lync user with different virtual IP addresses. This way each user will use different IP address for SRTP and the application will record without problem.

Does the Microsoft Lync Stress & Performance Tool have a mechanism to test this test case?"

Any help will be appreciated,

Thank you