SSL Gateway - is this possible?

I want to offer my clients an SSL gateway for their sites, like this:

https://secure.myhostingcompany.tld/sites/clientdomain.tld/
https://secure.myhostingcompany.tld/sites/clientdomain2.tld/
etc…

So they can access their site with ssl with a real ssl cert etc.
Is this possible with Apache 2.2?

Greets
Hal