How to map a domain having subsite in subdirectory of a subdomain?

Hi I have installed multisite in a subdomain like net.mydomain.com.
Subsites are in sub directories like net.mydomain.com/subsite1/
Is it possible to map URL of subsite like http://net.mydomain.com/subsite1/ to a Domain like clientdomain.com.

I want URL of this type http://net.mydomain.com/subsite1/ to open in URL of this type http://www.ClientDomain.com/
Is it possible. If possible How it works. I have used Domain Mapping for this.

Thanks.
Aman