If you want to use NAT:
You can have asus connected to the internet wia wifi and other computers connected to asus via LAN, OR asus connected to internet via LAN and others - via WiFi.
{internet} - (asus) - (other computers)
If you don't want to use NAT and you connect to the internet via WiFi, you can use Asus as Repeater.
Code:(asus) - wifi - {internet} | / \ (computers (switch) - (computers via LAN) via WiFi)