There are two issues here that are of interest
The checker API at Project-GC does not support anything with home location as it is right now. Integrity is of course the reason behind it. Checkers that exists today, can be ran with any name. But this could be solved, we could add a method that gets the home location for the logged in person. But that might take some time until such method gets implemented.
The cache owner strictly says that he does not allow any other information than from Geocaching.com, which is very sad. It could be of interest to have a checker regardless of that. But it sure gets a bit less interesting.
The first part here is something that I have to solved, and I want to be honest and say that it's not something I will have the possibility to solve the coming 3-4 weeks.
Then someone needs to write the checker, it could be me, or someone else. But all in all, it might take some time before you get some help with this one.