Can you not use the command line options: (don't know if this a current version of the mac launcher, but a nice guide is here:
http://macflightgear.sourceforge.net/ho ... ers-guide/)
From the manual:
- Code: Select all
--multiplay=out,10,<server>,<portnumber>
--multiplay=in,10,<client>,<portnumber>
--callsign=<anything>
Where
<portnumber> is the TCP port number of the server e.g. 5000.
<server> is the name of the multiplayer server e.g. mpserver01.flightgear.org.
<client> is the name of your computer, or the IP address ip address of the network interface being used by FG to connect to the server - even if that’s a local 192.168 type address. e.g. 192.168.0.1
<callsign> is the call sign to identify yourself, up to 7 characters, e.g. N-FGFS.
So just specify two different portnumbers for the 'in' command, depending on which aircraft you connect with, if its from the same computer.