For people who are on the same connection, it is important that each computer connecting to Amia have its own unique port number assigned. Otherwise, it causes issues with the server and creates a host of weird bugs that will interfere with your ability to play.
Here's what you do if you have multiple computers on the same connection:
In your NWN folder, open your
nwnplayer.ini text file, and scroll down until you see this section:
[Profile]
ShowMessageOfTheDay=0
Client Port=5120
ShowPregenChars=1
JournalPage=1
Player Name=*****
Email Address=*****
...
For each computer that will be using the connection, you will need to give it a Client Port number that isn't already used.
So friend #1 will need to have that line in their own nwnplayer.ini edited to Client Port=5121
Friend #2 will need to have that line in their own nwnplayer.ini edited to Client Port=5122
... and so forth.