If you have a logbook and you create a new entry, is it possible to put a time limit on that new entry so that edits/replies are only valid for certain amount of time.  I am looking for a way that would allow me to have a user start a new message, but after 8 hours, that message becomes locked and no one can edit or add to the message.  This is for some shift work and we do not want users to go back after their shift and edit the messages.