Dynamic lookup through different applications

Dynamic lookup through different applications

Hello, I'm trying to configure a dynamic lookyup between two different applications.

In an anagraphical application A I've a table called "Activities" with these fields: "Area" (lookup field that get data from another application A table) and "Activity" (input text). And this is ok.
In application B I've a form called "Race Activities" in which I use a lookup field to choose an area (and this is ok!) and then I need to populate another lookup fields with application A, table "Activities" datas, filtered by the selected Area.

Is it possible?
I try to search help on google but I can't find anything.

Thank you