Hi,
If your data is always structured in the same way, then you can apply macro like this:
{% Documents.Where("ClassName = 'CMS.MenuItem' AND NodeLevel = 1").Filter(CurrentDocument.NodeAliasPath.StartsWith(NodeAliasPath))|(identity)GlobalAdministrator%}
, but this will work only if the structure of the content is always same.
Best regards,
Dragoljub