Restrict Access To Filter Data In Pivot Table?

I am looking at a way to create a dsitributable excel spreadsheet (.xlsx), which contains non-sensitive, yet restrictied organisational information segmented by regional department for NCSA, EMEA for APAC respectively.

By design, all data has been collected in a datatable on a password protected "data" sheet - and - presented on an "executive summary" sheet. T

The "executive summary" sheet contains a privottable with select "multiple options" to allow for aggregated dataviews on executive level. However, on a regional department level, the users must only see their own regions, hence the filtering mechanims on the pivottable should be restricted.

Currently, the restrictions on the pivot tables are made in VBA, using the following script. However, it still allows people to change the "multiple options" filter in the pivot. How can I restrcit this option

Sub RestrictPivotTable()
Dim pf As PivotField
With ActiveSheet.PivotTables(1)
.EnableWizard = False
.EnableDrilldown = True
.EnableFieldList = True
.EnableFieldDialog = False
.PivotCache.EnableRefresh = False
For Each pf In .PageFields

[code].....

As a sidenote; the above design requires that a spreadsheet is compiled for each region each month. Ideally, the ability of filtering, could be password restricted - or - filteren. So only one selection would be presented for the NCSA, EMEA and APAC respectively, while Executives could view across one-or-many regions? However, as Pivot tables are used by design, I cannot see how this could efficiently be achieved?