data quota limit on dhcp customers.

Dear ALL,
Is there any possibility to add quota limit on DHCP customer following is my scnerio.

Customer======> switch=====>MT-eth-1 static-dhcp-ip’s+simple queue ===>MT-eth0=====>WAN

i want to add 1gb or 2gb download quota limit on these users any help plz,

Regards,
Fawad Ahmad.