>FoxInCloud does the same functionality (using west-wind web connect) by populating wwSession.userID with transform(application user ID),
>and executing this code that kinda makes application user ID unique in session table:
>
>

>lt = Datetime()
>SELECT DISTINCT sessionID;
> FROM wwSession;
> WHERE lastOn > m.lt - m.this.oSession.nSessionTimeout; && active session 
>  AND NOT sessionID = m.this.cUserID;
>  AND userID = m.lcUserID; && Même ID utilisateur d'application
> INTO ARRAY laResult
>
>* If user already opened an active session on another machine / browser, terminate
>IF _tally > 0 && Devrait toujours être = 1 en principe
>	FOR liResult = 1 TO _Tally
>		this.oSession.EndSession(laResult[m.liResult])
>	ENDFOR
>	this.oSession.LocateSession(m.this.cUserID)
>ENDIF
>

Yes, this is exactly that.

But, does this rely on IIS to save a session state? If yes, what is the load of concurrent session state do you have to save at IIS level?