Well, if your just trying to connect using lan. You dont have to change ips at all.
you can leave it like this if your going ot connect via LAN
Char_Athena:
login_ip: 127.0.0.1
char_ip: 127.0.0.1
Map_Athena:
login_ip: 127.0.0.1
map_ip: 127.0.0.1
Although, if your going to have other people connect to your server. You need to have it the way I suggested