FileDirector has multi-layered security. Firstly you can control security and rights per document type. You could set it so that you could edit or delete documents in a Document Type but a group of colleagues can only view a document.
You can also change the security for a specific document by finding it and then changing the security settings in the edit section of the ribbon bar.
If a colleague can see a document type that they aren’t supposed to see then you need to change the security settings in the Enterprise Manager.