To confirm! Can I use the license via local ip to the pc where I placed the test site? Examble: 192.168.10.30/forum It's all in localhost not public. 

You can indeed. You would use your test license key, which is your main license key with -TESTINSTALL at the end.

8 minutes ago, Marc Stridgen said:

Puoi davvero. Dovresti usare la tua chiave di licenza di prova, che è la tua chiave di licenza principale con -TESTINSTALL alla fine.

Yes I did just as you said. It also appears in the client area as a test site. Thanks Marc

No problem at all 🙂