All it shows on the "radar" display are aircraft transmitting ADS-B, i.e. their exact location. These may be any type of aircraft so fitted. All aircraft transmitting Mode S will be listed separately, but that would not be much use for what you suggest. There are some fancy internet programmes which claim to show the positions of aircraft not using ADS-B but I doubt that they would be accurate enough.
I'm not sure how it would function in a moving aeroplane, possibly not at all.