In my use case that makes things overly complicated, I just want all of my contacts in one logbook.
Of course that's my choice but there isn't currently a method of adding location information in the QSO-Station tab. Would you consider adding a field that could accept a Maidenhead Locator of up to 8 characters, using the ADIF MY_GRIDSQUARE field name as a reference would enable my use case.
There would be a follow on burden under Analytics tab so that I might be able to make a query for QSOs made from MY_GRIDSQUARE, the same would apply to the Advanced Search.
It is entirely possible that I'm missing something that drives your method!