Can I enforce required approval on some files

Dear Group,

I have been a happy SVN user for quite a long time, but now I miss some functionality in Subversion. I wonder if it could be done in git. If so, I convert to git right away :-)

There are some files in our repository that all their modification
need to be approved by a project leader.  In general the desired
behavior would be (examples given in svn commands) :
- user runs "svn ci"
- some files have status "pending" or "waiting for approval"
- anyone can do "svn up", modifications to the pending files are not
retrieved, project leader can get the modified versions
- project leader accepts the changes
- anyone running "svn ci" sees all the modifications

Best, Tim