First I enjoy to tag all my photographs when possible with GPS coord. If I am using my Cell phone or my Canon 7D Mark II or 3rd merge Garmin GPS cords with pictures.
In LR, when GPS coords are found in the photo Exif data and or added externally the arrow/flag in the Map module is always orange/Yellow.
Could there be a way using the Camera Serial # from EXIF data to indicate a different color arrow when multiple camera images are combined in same file.
Could help if using map module to see what pictures were taken and by who?