Thank you for your post.
Get (SystemNICAddress) returns the hardware address of all the Network Interface Controller cards connected to the machine as a return-separated list. Since you have three network devices connected, you will get a list of three addresses.
At this time, there is no function to get the MAC address of the hosting computer; only the IP Address. I recommend entering this as a suggestion into our Feature Requests web form at:
The entries into this web form populate a database file that is monitored by Product Management and Development. All entries are read, discussed and considered for possible implementation in a future release. Although I could copy your post and paste it into the web form, there are a couple of questions asked on the form that only you can answer.