Ok, well I have V4 running on Ubuntu (18.04.1 LTS), using WInHQ (https://wiki.winehq.org/Ubuntu).
All I had to do is to open the .exe installer with the wineloader. (open with...)

It's actually running very well, step loader is multi-threaded, but maybe a little bit slower than native windows (I have to do precise test about this).
Selections are fine, I'm using an old GTX260, with the default Ubuntu driver (Nouveau display driver(open source)).

I need to see if this driver is working fine with Houdini, compared to the proprietary Nvidia one.

Thanks Michael to make that happens !