From the little I've seen there's no follow command in space and it's mouse intensive.

It'd be doable but I'm guessing very difficult for two ships and exponentially worse for each extra ship. Three might be possible for someone very skilled but I doubt any more would be genuinely possible. You'd also need to hardware box it as Cryptic use anti-botting code in their products that buggers up multiple instances on one PC.

I don't think you'd gain much by multiboxing either, everything is instanced and the instance difficulty ramps up with more people in the team.