Can I restrict users from running specific reports?

Yes. You can create a privilege to provide access to only specific reports that are available on the Reports tab and then assign the privilege to the required user. While creating the privilege, all the available reports are selected by default on the Reports tab. You need to clear the check boxes for those reports for which you do not want to give access. When the user uses the application, he or she can only see the selected reports on the Reports tab.