You can use Respondus with Moodle (your probably already know that).
Password control on reviews as well as attempts has been discussed, but never implemented.
There are other ways to control reviews. E.g. in the quiz settings you can turn off the option to allow reviews. Then, you can edit the settings to allow reviews only during the proctored time-slot. Ah! I guess that does not stop students outside the room from reviewing. Hmm.