Well, it's pretty easy to setup your computer to access only octane live and blocking everything else, thus keeping a tight security and using octane, or any other app that need live internet connection.
Here is an easy guide by Radiance himself:
http://www.refractivesoftware.com/forum/viewtopic.php?f=9&t=2857&p=27494&hilit=ethernet#p27494Besides that "security" issue, Octane Live's advantages surpasses any drawback you can think of with all it's nice features already there and the many more that are coming, the live material data base, only that, by itself is worth it, access not only to your own materials but that of many great users out there, with a simple click, with no fuss of installing or downloading, by themes with the fastes preview ever.
Octane right now is on the edge, but in a few years most of our softwares are going to be live, that's for sure.