Another question about multiple domains…

I’m wondering if it is at all possible to create a condition to redirect to different domains for the same site. For example, I want to have two domain names:

site.com
m.site.com

The m.site.com will be the mobile version of site.com, which is served from the same wordpress theme. Is there a way I could use the domain mapping plugin to accomplish this?

http://wordpress.org/extend/plugins/wordpress-mu-domain-mapping/