Hi.
You can use 'Overlap Sphere' (
Ecosystem)
It will place all the objects of your selected layers in an array.
Then you can loop thru the array by using 'Array Get Next'
and you can check the tag / name if needed.
Then you can do to that object what you want and loop back to the 'Array Get Next'
@ToxicFrog :
'Find' actions can become 'expensive' as it has go go thru all objects of you scene (including all child objects)
on bigger scenes you can get a short lag on it