That capability is already there. As others mention, NFS is in base and
Samba can easily be added from ports.
There is also an AFS client (Arla) and the server in ports, if you are
going to be working with redundant servers and or a larger number
of de-centralized users.
If you just want to give quick acess to users, then you already have the
ability to serve chrooted sftp in base. Just make the changes to
sshd_config for the groups you want and show your users their sftp clients
most file managers for linux distros have sftp support built in, if that
is what they are using. A nice touch, for some, is to use SSHFS to make
their remote SFTP access appear as a local folder.
/Lars
