Is there documentation as to what a 'jurisdiction' is in LCCN terms?

When https://id.loc.gov/authorities/names/no2008045986.html says it's "Collection Membership(s) [...] Names Collection - Jurisdiction" what does that actually mean?

#libraryOfCongress #Cataloging #LCCN

Lower Hutt (N.Z.). NewDowse - LC Linked Data Service: Authorities and Vocabularies | Library of Congress

So, I decided to organize our non-fiction books at long last. I thought I'd be clever and do it by control number.
Why do neither #DeweyDecimal or #LCCN have a category for Biographies?
We've got a bunch of biographies and using either of those they are nowhere near each other!