Thread:Project:Support desk/If possible to create a section that would have had access to certain users?

We need to create a section in our wiki, which will be accessed to certain users, i.e. a group of people can browse only this section. Our wiki is a internal wiki about a company. There are a lot of information for personnel, e.g. important documents, price, etc. Also there are catalog of products, so we would like a certain group will be able to browse only catalog and will not be able to browse important document for personnel.

How can we realize it???