Your computer has a specific MAC address which you can get from following function :-
(defun get_macaddress (/ query retval)
;;Source : http://forums.autodesk.com/t5/visual-lisp-autolisp-and-general/seial-number-etc/td-p/2674574
(vl-catch-all-apply
'(lambda ()
(vlax-for item (setq query (vlax-invoke
(vlax-invoke (vlax-create-object "WbemScripting.SWbemLocator") 'ConnectServer "." "root\\cimv2")
'ExecQuery
(strcat "select * " "from Win32_NetworkAdapterConfiguration " "where IPEnabled = True")
)
)
(setq retval (vlax-get item 'MACAddress))
)
)
)
(if query
(vlax-release-object query)
)
retval
)
(if (eq 'your_hardcoded_MAC_address' (get_macaddress))
(progn Its your computer )
(progn Your code has been stolen !)
)
Please see following link to see MAC address in Windows :-
https://helpdesk.latech.edu/index.php?option=com_content&task=view&id=207&Itemid=79Also note that if you have multiple Network Connections such as 'Local Area Connection' , 'Wireless Network Connection1' , 'Wireless Network Connection2' etc the MAC address would be different for each connection.