Create a script for ip based trafic shapping (on openvpn tun interface) on centos 6.4 with tc (lartc)

I need a strong skilled person who know shapping with tc (lartc) after a successfully openvpn authentication; You have to create a script which will shape traffic depending on user's who want to connect to my openvpn server; I've started the script: openvpn authentication part is done; Just need to create/delete qdisc and add filters on openvpn connect/disconnect script; I'm on centos 6.4;