Many applications use data that is for authorized users only. The following list suggests ways you can protect sensitive information in a form. Note however, that the fields associated with a form can still be exposed in a view.
Application.GetNameSpace("MAPI").CurrentUser
The Visible property makes a control visible or invisible.
Note Using passwords or any other techniques listed above can improve the security of your application, but these methods do not guarantee the prevention of unauthorized access to your data.