Monitoring communications between processes on a socket (mac)

I have a process with emulates a device we develop. Is it possible to have IO-Ninja capture & decode communications on the socket between the processes?

Thanks.

What kind of sockets are these? UNIX domain sockets? Or TCP/UDP?

If that's TCP/UDP we are talking about, then you can capture communications with Pcap Sniffer/TCP Flow Monitor/UDP Flow Monitor.