Sort list items onto separate flat lists

[BoavistaLudwig]

Hello, could it be possible to start with 1 flatlist and sort its items onto new/additional nested flatlists?

I.e.

(1) I start with a flatlist of grocery product items (2) I create 2 additional and nested flatlists and name them according to stores that I will visit for purchasing (3) I sort items from the initial flatlist onto these two new nested flastlist (4) I keep some items in the initial flatlist and rename it to another supermarket I frequent (5) I get 3 flatlists, and 1 grocery shopping list for each market I visit