Multiple Domains

Hello,

Working for a friend/client on a simple photography wordpress site. He has two domains. He wants both sites to look the same but that his portfolio sits on one site and his blog sits on another site.Ideally, it will work in the same the wpmudev=site/wpmu.org sites work. Is this the multi Domains plug in and will other wpmudev plug ins such as infinite SEO extend to cover both sites?

If you could let me know that would be great.

Thanks

Nick