I think of two options. It really depends on what devices need to receive the signal.
1) OSCulator. This can take in
MIDI signals and convert them into
OSC commands (the new
network version of
MIDI). Check it out. It's pretty easy. You can even download a fully functional demo.
2) If you can't use
OSC, then you're probably looking at UDP commands. This is a deep step into nerds-ville, but you could use python code to achieve this.
Here's a link to an example of that. Scroll down to the third post that starts with "Python is truly wonderful".
Run that code via Idle (if you're on a
mac, you already have this). Just change the Note, Endpoint, and Message .... Copy the IF
block of code for each
MIDI command you need. And there you have it, you made your own custom piece of code! .... Well .... adapted .... let's say adapted.