Get-Counter -Counter '\web service(_total)\current connections'
You can also use performance Monitor utilizing the same filter/”counter”.
To view all filter/”counter” types: (*note a lot of output, may want to pipe to file)
This is useful info if you plan on making Site Changes and need to know how many people might be affected. At the time of this writing I haven’t been able to figure out WHO these connections belong to, however I believe with more knowledge this might be possible. I’ll leave this open for the time being, and come back to it when time permits.