About the only commonality between LTSP and multi-seat is the number of displays, keyboards, and mice. Multi-seat has 1 "computer [box]", one hardware display card [although can be more], one filesystem. LTSP has one "computer [box]" per seat, one hardware display card per seat, often one root filesystem per seat. LTSP uses ethernet, multi-seat uses USB2.0 [often in "star" configuration, although using hubs and/or daisy-chaining also works.]