WebForms features advanced permission system which lets you set role permissions for each form.
- Enable "Display in menu" option on forms edit page.
- Go to System > User Roles and choose the role you wish to add permissions for the form.
You need to remove permission for Manage Forms if you wish to limit permissions only to forms of your choice.
- After user with the selected role logs in next time, his Web-forms menu will be updated, leaving him only what you permitted.