Unfortunately, currently the Export permissions feature is not available, yet. You may only setup the Export permissions from Table setup by enabling the related Export options.
Unfortunately, currently it is not available. There is no such code in the generated phpfn.php file that have the ability to manage the Export permissions.
As you can see the functions such as: canAdd, canEdit, canDelete, canList, and so forth that belong to “AdvancedSecurity” class… but there are no related Export permissions/functions such as: canExportExcel, canExportWord, canExportCSV, and so forth.