Network Diagram Chart node selection - select node and all related nodes at once by filter

[TonySchullo]

I have a network diagram that shows all my apps and there relationships to each other based on input sources (DB/QVD/XLS). Thus, I have parent apps such as extractors that feed into transform apps which feed into presentation apps which in turn may have outputs that feed into other apps.  When I select a node on the network diagram chart, the extension finds all related apps/nodes and they all get selected at once.  This is nice because you can see both the upstream and downstream connectivity.  However, If I add a selector by App Name (linked by ID) I will only get one app selected.  The extension then zooms into that node bt shows no connections to it.

I would like to replicate the way the chart selects multiple apps at once by clicking on one node.  I used HierarchyBelongsTo to build a link table that shows all appIDs related to an ID. For example:

SelectedAppID, RelatedID, appName
3, 3, MyApp
3, 2, MyTransform
3, 1, MyExtractor

This works fine but only seems to work upstream.  If I select app 2, It will list the extractor, but not the downstream presentation app. 

SelectedAppID, RelatedID, appName
2, 2, MyTransform
2, 1, MyExtractor

How do  I replicate the network diagram chart's way of selecting all nodes both upstream and downstream?