Also the help notecard in the collar (Menu: RLV->Relay->Help) is more
up to date, in particular the one in the beta collar.
Otherwise, restricted just means that the relay will reject every
command except the ones sent by already known and trusted sources
(owned by your owners or whitelisted).
I hope this helps.
--
Satomi
It looks like the documentation is a bit scattered in several places
http://code.google.com/p/opencollar/wiki/BetaUsersGuide#8.5_-_Relay_menu
Feel free to make this more explicit, if you think it is necessary.
Cheers