filtering accounting

Hi, We are using FreeRadius 3.0.8. and Mikrotik NAS. We have a MPLS vpn where our clients are connected. We are providing IPTV in our LAN and also internet through the same connection. The problem is, We want to account only internet traffic. Not IPTV traffic. How we can filter it. In the interim update, we are not getting any ip information. Else we could have omitted the traffic where our streaming server ips are included. Please suggest some solution. Regards, Randeep