A little complex collection?

Hi all,

i like to get a collection that shows all subpages of specific taxonomy (or page type) XYZ.

content:
  items:
    - '@self.children'
    - '@taxonomy':
         category: [blog, featured]

=> Returns all children AND all pages with specified taxonomy ... not all children WITH specified taxonomy.

Is there a way to do this within frontmatter or do i have to write a PHP Plugin that i can use?

Any hints are appreciate!

Greets, Chris

By the way, i'd like to use the pagination plugin ... otherwise i would loop through the results and get rid of the unwanted children that are not taxonomy.category = [blog, featured]