Configuring IP Spoofing in LoadComplete

How to configure IP Spoofing using LoadComplete ?

Means If I have configured 10 Virtual users, Each user should hold  different IP addresses while executing tests.

Eg: 1 – VU – should hold 192.168.1.1

       2 – VU – Should hold 192.168.1.2

       3 – VU – Should hold 192.168.1.3

PS: I want to assign dynamic pool of IP address to the Virtual users where each virtual user will hold one IP address during the test.