The composite filter captures quite a wide range of accounts. I can't see any way to refine this filter without some kind of 'Not like' function.
I can do way more robust filtering in the Complex Expression, but by that point I can't find a way to go back out and try the next mapping type (i.e., List)
The Complex Expression will run through all members that are within the filter of your Composite mapping. This means that even if you get a function that says within your complex expression "when account = xyz, then move to list", it does not give you much of a benefit over just mapping this member in the complex expression as well since it is already being checked.
Here is a post on IdeaStream asking to add something along the lines you are asking here for if I understand you correctly. Consider leaving a kudo to support this request if you agree:
JIRA Ticket: PF-21104 (onestreamsoftware.com)
(unless this has been added in the meantime and I missed it)
