This tag likely refers to a specific P2P (Peer-to-Peer) release group or a community forum (such as RapidShare
Most plausible: This encode used the and a high number of reference frames (hence the ‘l’ as a modifier in the internal log). Practically, it means: -RS.com- Veer-Zaara -2004- - 720p - BluRay - DTS-ES - X264l