Hello,
Using localhost (127.0.0.1) or a private network (class A, B or C) you can set phpdocxconfig.ini as:
[license]
; PHPDocX license code
code = "localhost"
; subdomain (Basic license), domain (Advanced license) or IP (Premium license)
value = "YOUR LICENSE KEY AVAILABLE ON MY PHPDOCX PAGE"
The same license can be used on localhost, private networks and the chosen subdomain/domain/IP. After setting the definitive domain to your license you can use the same license for development and testing.
Regards.