The "Citizen Khan" tag is a virtual calling card, or "brand," used by a specific active on various platforms. In the world of digital piracy, "release groups" are organized teams that specialize in obtaining, processing, compressing, and distributing copyrighted content. These groups often compete to be the first to release a high-quality copy of a new movie. The addition of -CitizenKhan to a filename serves multiple purposes:

This indicates that the video source is a recording taken directly from a movie theater screen, usually with high-quality audio captured separately or a direct feed. While it is "HD" in resolution, the source quality is generally lower than a direct digital release (web-dl or bluray).