The JWed Match app allows you to change your filters by location to only show you people within a certain mile radius of the location you choose. Just go to Search, then tap the filter icon on the top right and you'll find the location filter.
Please be advised that JWed.com works differently. On the website, in addition to users within the radius which you choose, you will be presented with people who have any association with that location. For example, if you are searching for New York, you will be shown profiles of people who are travelling to New York soon or who want to settle down in New York. These users have their location highlighted with an icon and if you click on the icon, an explanation will appear as to why that profile is shown in your results.