It is in the roadmap, but the SimConnect SDK is very poor on this feature, not sure how that other software does, but I tried with SimConnect and did not like the results at all.
SimConnect, as I know, reports the position of the plane and nothing else.
Additionally, I'm also working in a proprietary multiplayer system for SkyElite. The limitation is that it will show only your group, your friends, your selected users, not all the traffic.
Instead the pros are that lot of information is received from other players in the map: name, altitude, speed, distance, vs, bearing, and much more.
But is still in the very early stages of the development.