I already tried the folowing:
 IReadOnlyList<User> users = await User.FindAllAsync();
 var current = users
      .Where( p =>
          p.AuthenticationStatus == UserAuthenticationStatus.LocallyAuthenticated &&
          p.Type == UserType.LocalUser
      )
      .FirstOrDefault();
 string dominio = (string) await current.GetPropertyAsync( KnownUserProperties.DomainName ); // cause an error
Not worked: "A method was called at an unexpected time"
How do I get the domain name or domainname\username?