Title explains it: Wondering if there's a way to search only information within a subtotal grouping in order to highlight duplicate values within that subtotal.

Added complication, cells are subtotaled by Column A, I want to search Column B for duplicate values within the subtotal. There will be many duplicates throughout Column B in general, but I want to ID if there are duplicates within the subtotal groups ONLY.

Is this possible? Via what route? Game to try and figure out the actual method specifics myself, but do need a point in the right direction or to know if this is even possible.

TIA!