Setting up a password authentication to LAN is not possible but you can put restrictions to some devices when connected to your LAN.
Simply do the ff:
1. You need to enter to your dashboard and look for the tab wherein you can set filter to MAC addresses.
Common name of the tab is "Ethernet Filtering". MAC address is the ID of a device.
2. Get their MAC addresses and add it to the filtered ones.
3. Save it and see the results. Note: you can also do this for mobile phones. Add their mac address to the ethernet filtering tab. works also this when in wifi.
For further assistance, contact any of the support channels. Contact Us
Hope this helps.