How to change output IP on the IIS7 , different website with different IP?

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http://serverfault.com – I have 1 network adapter and it has 3 IP. (with advance settings/add IP) for example , 1 - 2 - 3 - And I have 3 web site on IIS Manager ,, For example, 1 - WebSite1 2 - WebSite2 3 - WebSite3 I want to go outsite with different IP, so , when I use WebSite1 , i want to use, when I use WebSite2 , i want to use, when I use WebSite3 , i want to use, but these IPs will be are output IP,, How can I do that ? I need to solve this problem,, Thanks for any advice... (HowTos)