Today Cathy Nelson, posted this question out that seemed like a reasonable request and something you should be able to do, so I tested it out. 

Create a NEW group in Google Groups

Next, add that email under forwarding email addresses in the settings on gmail (you will need to confirm that address)

Verify the email address

Now you need to add the filter itself. Click on more and then "filter messages like these"

In the subject line make sure that you enter the text exactly as it appears in the email.

Insert the New Google Group Address and Voila, your emails will now be distributed to any groups that you want. This can be a powerful way to automatically share emails to folks that need to be "in the know" in your organization!

Whoo hoo!