Is the analemma is a useful tool for locations north of the Tropic of Capricorn?

The Tropic of Cancer can be either north or south of the Tropic of Capricorn, since the Earth is round.

It's south of the equator.

It is south of the equator (also south of the United States, Canada or Europe).

South

Yes. The Tropic of Cancer lies in the northern hemisphere, while the Tropic of Capricorn is within the southern hemisphere.