Hy Glorius1, you're right, I should have been a little more detailed. But, I did follow the manual instruction at the top of this thread with no deviation via SSH.
The only difference is that during the installation of openvpn I cannot select the PSW option, but as the doc states in my previous post it should be enabled by default in the latest distro of openvpn.
So, the service starts, transmission works, but there is no IP masking. User and Passw in text.txt are correct, config is correct. So i deleted the plugin, the jail and i used the script at post #3 on page one. NO dice, the old Ip and new Ip are the same.
I have been experiencing problems with plugin and jail setup in 9.10, the only way to get them to work was to set static IPs to the relative jails and, in the case of transmission, disable vimage.
So, the way I see it, there are two possible problems:
A) Openvpn does not really read user and pass from pass.txt, so there's no real login, in which case I need to find a workaround to force login
B) the static setup I needed to use in 9.10, contrary to 9.3, messes with openvpn and does not allow it to run properly.
That's my tow cents. I'm going to upgrade now to the new version of 9.10 that show up tonight (well, it was night here) and see what happens.
Ciao soci and thanks for any input!