What should do to restrict access to some shared folders?

[pockycat]

I have a computer which is password protected. There are some folders which I want to share with everyone on workplace network.
I want password protection for certain folders, and no password protection for other public folders. And now I want to password protect some shared folder, and allow some colleagues to read and print the contents, but can't modify and copy, some colleagues can't even read. At the same time, my boss and superiors can have full right. Is it possible, and how to set it?