Is it possible to get the underlying session relevance that powers a Custom Filter? (No)

[jgstew]

See this response from @steve :

Add ability for console filters to show only items with default actions

Yes, the different tree structures you see in each domain are defined by XML and session relevance loaded from a .BESDomain file. It is possible to create your own custom domains by creating these files based on the BESDomain.xsd in the BES Console\Reference directory. You can also look at existing ones inside the BES Support site, as a starting point.