Filter pages on specific visitor group

Hi,

I have a list of UsedVisitorGroups, I used the code from david-tecs Visitor Group Usage Viewer  https://www.david-tec.com/2015/05/visitor-group-usage-viewer-for-episerver-8/

And a list of pages that uses Visitor groups:

var personalisedPages = new List<ContentReference>();

foreach (var pageRef in contentLoader.GetDescendents(ContentReference.StartPage))
{
var page = contentLoader.Get<PageData>(pageRef);

var isPersonalised = page.Property.Any(p => ((p as IPersonalizedRoles)?.GetRoles().Any() ?? false) ||
(((p as PropertyContentArea)?.Value as ContentArea)?.Items?.Any(x => !string.IsNullOrEmpty(x.ContentGroup)) ?? false));

if (isPersonalised)
{
personalisedPages.Add(pageRef);
}
}

I'm trying to match page with visitor group, to be able to filter pages for a specific group.

So the outcome will be something like this https://world.episerver.com/globalassets/globals/xmlrpc/21272/2011/08/18/image_2.png

Suggestions?

Any help very much appreciated!