If a system is using a domain locked license the only ways to know that is to go into an application configuration in LFDS and see if the 'Licensed Domain(s) / Specific Machine' option shows or to open the license file and see if the '<DomainNames>' section is populated. It would be great if on the Settings-> General tab in LFDS it let you know (as well as what Primary License is being used).
It would be nice if it showed what domains are licensed too. It would just need to be something simple, like:
Licensed Domains: mydomain.com
In one of these places: