While ronin are not unwelcome members of the VolityNet network, their creation is entirely an exercise left to the interested player/programmer; no official Volity software application or library explicitly supports them. (That said, FriVolity's Volity::Bot Perl module, currently in development, might end up being a good starting point, depending upon how it ends up...)
It is still preferred practice for a ronin to identify its role as "bot", not "player".