On the bottom of this page I can see two trackers using ENHS, one of them is mine
flightaware.com/adsb/stats/user/FlyTT14
but how can I see which one of them being used in the tracklog ?
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Lasse
Tracklog positions that came from you will show the airport code followed by your username and the MAC-address of your receiver. (assuming you are logged-in)
If the position only shows an airport code, as far as I know there is no easy way to tell which user it is from… you only know it is not you. In your case, since there are only two ENHS feeders, positions without your name must belong to that other guy 
Thanks