Identifying different labels on the same node

Hi,

 I've searched the forum and have not been able to locate anything along these lines.  I need to select all labels on

"layer 1" at the top level of a layout and find the label that shares the same node (or, effectively, shorted to) on "layer 2"

a couple levels down in the hierarchy.  The origins of all labels should be within the extents of rectangles on a "layer 3"

if there's a way to apply a boolean (layer 3 AND label origin??)  This would be like a text shorts checker (?)

Thank You.