In VOY: Dark Frontier, the crew stage attempt to beam some Borg off the bridge (in a simulation). This proves impossible because individual Borg are able to inhibit transport.
CHAKOTAY: Beam them out of here.
PARIS: I can't get a lock. They've adapted to our transport frequencies.
CHAKOTAY: Computer, freeze programme, both holodecks. What happened?
Moving (way) down the canon scale, in Star Trek: Online - Khitomer Crisis, a crewman is capable of beaming some Borg into the pattern buffer, then rematerialising them next to a hull breach, to be jettisoned into space. This only seems to work because the Borg are seriously malfunctioning.