Yep — as long as those are cells there and not just the summaries of collapsed groups (because you cannot conditionally format the summaries).
You basically need to generate yourself a separate table where each row is a unique combination of a property to the left (cashflow prop) and the property to the top (month), then calculate those numbers with a formula.
It won’t be that collapsible though: e.g. you cannot build this directly on the table of transactions and make the summaries formatted. You can only conditional-format data cells, not group summaries.
P.S. Another thing that you can do is generate a not-a-model table (I call these report tables) and be creative with what you do with your rows and columns altogether — basically replicate spreadsheet logic with it: