Recently I found an article quoting an IMDb Factoid that the character Switch in The Matrix was supposed to be played by two actors, one male and one female:
When Belinda McClory auditioned for the role of "Switch", she was only going for half the role. The character was originally planned to be played by androgynous actors. In the real world, it would be played by a male actor and in the Matrix be represented in a female form, hence the name "Switch". Warner Brothers refined the idea and McClory ended up getting a single female role in both environments.
Other sites simply say that Switch is just another reference to computer terminology.
Switch's name may be a reference to a network switch, or any number of "switches" used in computer technology. Many other Matrix characters' names reference computer technology, such as "Mouse" and "Link". The name Switch could also be a reference to her white clothing ('switched' from the usual black attire worn by the others).
I'd love to believe the former is true. I think it's great that Larry/Lana was trying to share herself in a small way from so early in her career. I also think that this would have made for a very interesting added facet to the film (Would Trans people have even existed inside The Matrix?... mind... blown).
I also know that The Wachowskis are well known for being very quiet and reserved, avoiding media and interviews, so finding concrete evidence may be difficult.
I'd love to see if anyone can find some hard evidence and, lacking that, any soft evidence that makes a strong argument one way or the other.