Of course. That is such a risky proposition though, running shows with your own personal machine.
What if your machine is stolen or broken the morning of a show? What if software you add for other uses causes instability with the machine? What if your hard drive fails? What if...?
Setting aside the fact that it's your personal property (not a trivial fact at all), it introduces a significant element of risk for the producing organization. If a company can't afford the hardware cost to set this up properly, then they really cannot afford to be doing show control. I get it, most theatres have tiny budgets. That's OK, not all theatre needs to be technology intensive - but if you're going to go down that path, do it right or don't do it at all.