Password protection of part of a site

Hello guys.

Did someone in the community already developed a Radiant extension to
protect with a password part of a radiant-based site (I recall a
behavior of Matt McCray)?

In addition, I recall that someone is working on the possibility to add
finer granularity to accessing part of the admin interface for end-users
(so that they cannot ruin part of the work done by the designer). Will
this extension be made available by the programmer to the community?


P.S. FYI, I’m just a designer and not a programmer.