Is there a way to save your last multiplayer mission as a track? Specifically, after the fact? Is your last flight automatically saved as a temporary track somewhere?

AFAIK -- nope - not unless you press the record keystroke.

EDIT FOR CLARITY:

1) YES...provided you begin recording during the mission.

2) Definitely NO.

3) No....as Brian and I indicated you have to start/stop recording at your discretion during the mission, there's no automatic about it. If you don't stop the recording on your own it will stop and save when the mission does and the next time you begin recording it will record a new track (it will also record a new track if you stop it during a mission then start recording later in the same mission, it doesn't pick up where you left off}.

Playback is accessed from 'flight records' in main menu. I don't recall the default key to start/stop recording, I rebound mine long ago, but it is assignable in 'controls,' for certain.

[MF] Gunloon

Left Cntrl "R" starts and stops recording by default.

Rob