Can I run FarFinder on more than one Mac on the same network?

Yes, but you need to make sure of three things:

• If more than one person will be using FarFinder you need to buy either multiple licences or a family licence.
• Choose different Find Me names for each Mac.
• Use different ports for each Mac. On one computer, go to FarFinder's Network tab and change both port numbers. Since the default is 8889, if you change them to 8890 that will be fine. (Technically speaking you only need to change the public port, but you should keep both ports the same unless you have a reason not to.)