I believe you can do it by creating a new security rule just by that App, or by using custom properties, to a class of apps that you might want to restrict this access, e.g., create a property called ALLOW_EXPORT_DATA that can only be applied to Apps and Users (in case you also want to restrict this by user) and set its possible values to TRUE or FALSE.
You would have to modify the generic access rule used for all other apps, so that it would only work for apps that do not have the specific custom property that you created for this purpose set to FALSE. Finally, you also need to create a copy of that security rule, make sure the Export Data action is not selected and modify the rule so that it would only work for apps that have the ALLOW_EXPORT_DATA property set to FALSE (https://help.qlik.com/en-US/sense-admin/November221/Subsystems/DeployAdministerQSE/Content/Sense_Dep...)
I believe you can do it by creating a new security rule just by that App, or by using custom properties, to a class of apps that you might want to restrict this access, e.g., create a property called ALLOW_EXPORT_DATA that can only be applied to Apps and Users (in case you also want to restrict this by user) and set its possible values to TRUE or FALSE.
You would have to modify the generic access rule used for all other apps, so that it would only work for apps that do not have the specific custom property that you created for this purpose set to FALSE. Finally, you also need to create a copy of that security rule, make sure the Export Data action is not selected and modify the rule so that it would only work for apps that have the ALLOW_EXPORT_DATA property set to FALSE (https://help.qlik.com/en-US/sense-admin/November221/Subsystems/DeployAdministerQSE/Content/Sense_Dep...)
