The FollowSpot plugin is a useful small tool to summarise up to four moving lights to on single follow spot. With it, follow spots can be simulated which illuminate a person on the stage from several sides. The plugin consideres the different positions of the fixtures and interpolate the their DMX values. This ensures that the person on stage is illuminated on all position by the four fixtures.
Additional information for the plugin can be found in the FollowSpot Plugin article (german) in the DMXControl-Wiki.