This was a mistake, thanks for the heads up.
No chance, but to be honest, it's fucking terrible and you are not missing anything. Also the game is very unstable on Windows as it is, I'm sure even the best Linux port would end up worse due to what a mess it is already.
I work for RWS yes, and it's an honor to work for a company that allows me to speak mind openly on mistakes made such as Postal 3 Russian Postal. They all know how I feel, I can't speak for the entire company publicly but that will come, in time.