I may be understanding the request in this topic. I think the idea is to allow for a Non-Admin user access in the same network without requiring it to use an external DNS server to access though a domain as it is generally used one from external network servers.
As it is, Yunohost allows for a admin access using the server IP and a non-admin access using a domain. My ISP, for example, is changing the routers features for home users, not allowing for a DNS loopback. This means from inside my network i can no longer access as a non-admin user, only as an admin one. If i try to access as a non-admin user, then the Yunohost redirects me to the chosen domain which is resolved in a third-party DNS server. The network and the ISP blocks the loopback.
Can the option be added where, from inside the network, the user login accessed in a certain domain without requiring an external DNS server to resolve the domain? Is there another way to configure it?