Unfortunately no this is not possible to do with the API. I assume that you only want to allow users of a specific location to access the search filters correct?
Given that this is not a native functionality in our Toolset Maps plugin you will need to use the custom code from the Google API to achieve this.
An example can be see below. hidden link
However if you're not sure how to implement this on your own site then I would highly recommend that you get in touch with a developer that can integrate this onto your site.
We have a list of developers that have registered with us and you can contact them by going to the link below. https://toolset.com/contractors/
Happy that you were able to find this article from our forums.
Is it working for you as intended? It should also be noted that we don't support custom code even from our supporters, however if its not working as intended I can have a quick look and see what I can do.