RE: Prevent some users from exporting Data to excel in Specific Areas
But if some user would like to do that, does your suggested solution really prevent them?
They can still take screenshots, print reports etc. If someone would like to break their contract and handle the data in a wrongful way, I'm sure they could still do it even if you disabled Excel export for them.
So I would like to ask you to consider again if this planned approach would really solve the problem that you are trying to solve. If not, then is it a problem that you want to spend time and money on?
You can prevent the users from using the Excel add-in (which is based on data entities) by not granting your users access to the related data entities. But as far as I know, you can't prevent your users from exporting grid contents to Excel on a form by form basis.