Open Source Document Management System | OpenKM

Hello, I know the tool now.
I would like to create a user who has access to only some or a folder of my tree.
Imagine creating a rule, but where do I set up the options of rules? if there is that possibility.
it comes with UserRole.
Is it possible I have a user that accesses one or another folder?
Thank you all.

What is the problem with the user / role permissions in the folders? It does not cover your requirements? Please, write a more detailed description of your scenario.

sorry for my English. I'm from Brazil.
I want to have users on the server of my company and a guest user has access to read and write in just one folder.
So that User shall not have access to company documents, but will have a place to send us documents.
Is it possible?

I thought of creating a new rule to allow only that, but of course if possible.
Or is there another way? Or is this not possible?

Thank you.

You don't need any kind of rule. With document and folder permissions is enough. Is very like the read and write access of you operating system.