Hi Julius,
About to "share" one RB to two computers at the same time.... I don't know, but
I have two Uboxes, that's a USB network server.
One RB and Ubox I left at Buenos Aires, and I connect to it every time I want to RB I left there, just as it (RB) would be here in São Paulo, but carching the flights from buenos Aires...
The other Ubox / RB I use here in my house in São Paulo, and this let me to "save" from the long run coaxial losses, and also allows me to access RB trough internet at any place in the world trough internet, just as if the RB would be connected directly to my computer / notebook USB port.
But always is only possible, in this configuration, to access RB with only one computer at a time.
Best Ragards . Juan