with 2.4 Ghz throttle control you can use multiple recievers, you can have a receiver in each fuselage and there is a way to have the first receiver power the 2nd one with a single wire.
for glow powered models the best way to set up the throttles is to have one servo per engine with a short pushrod that goes between the servo and engine. the multiple servos then plug in into one or more recievers to the same channel.
Fred