Yes, Theia3D can track multiple participants, provided that they are all sufficiently visible in the input video data. The number of people that can be tracked is dependent on their visibility, which is largely determined by the number of cameras in your camera system. Any participant that is sufficiently visible in three or more camera views will be tracked, provided they are not excessively occluded by objects or other people. Under crowded conditions, some people may not be tracked if they are excessively occluded by other people.