Hi,
6500 switch and 7600 router , we can use a similar policy map to limit the traffic .
Create three class-maps for each customer and match the customer ip addresses in indivual class-maps
configure a policy-map and call the class-map to policy-map and police each class bandwidth to the requirement.
or create individual policy-map for each vlan
Apply the policy map to the Vlans .
Just a addition , configure " mls qos vlan-based " under the Gig interface
A link for ref:
http://www.cisco.com/en/US/products/hw/switches/ps700/products_tech_note09186a00801c8c4b.shtml#ios
hope it helps
regards
vanesh k