The Document show that how to configure MPLS VPN with Export - Map feature. Using Export Map feature we can advertise the route that customer had requested .
We can restrict that advertisement of HUB VPN to other Spoke VPN .
Above topology show thta how to configure MPLS VPN with Export - Map Feature.
The attach link will give you complete document.
http://chetanress.blogspot.com/2010/08/mpls-traffic-engineering-vpn-with.html
Regards
Chetan Kumar