Help with redirection in wordpress mu

Attention"Assign to PC"

Hi, before I had written about this via email and I was attending PC.
I want to entrust something, I need your support.
We have the site done in "wodpress mu", and and are websites belonging to network but is working with their own domains.
We subscribe to them with you before, we had already used this plugin to make websites network can run their own domains.
We need your support to solve the following:
when one accesses the network websites mentioned above ( and without www, the system will redirect to the main page.
How can we do so that the url written in a domain with or without www not any problem with loading the website?
here is the htaccess file currently on

You guys can help us?