File Permissions etc

Hi there... I have been using another product and one thing I miss in ZOHO Projects is permissions.

Is there a way to set a file, event etc to only be seen by certain users? Example, I may not want a contractor, or employee to see a confidentail contract or the like.

Also, is there a way to make it so that client users can not see all users associated? Especially users that are contractors. If I use an outside contractor, I do not want a client to contact them direct behind my back.

Thanks for the answers in advance!

Darin
darin