Electrodeposition on a non-conductive surface is in fact a strange idea. What do you want to deposit on your ITO? There are so many coating techniques that work with non-conductive substrates, I'm sure there'll be a way.
If you want/need to use electrodeposition on a non-conducting substrate, maybe you could coat the substrate with a thin metal film, say by evaporation, and then electro-deposit on it.
But it really depends on your material, I think that a general answer is impossible.