In the MBII wiki " MB_ATT_ANTI_MT " is purported to make the player immune to force Mind Trick, but ingame it doesn't seem to have any effect. I've tested this at values 1 through 3 with no difference.
Hasn't worked since at least V1 or 7 years based on code. May not have ever been implemented for non-droid classes, but it is not hard to allow in FA with some restrictions (no force sense or tracking darts since they partially conflict here).