With this extension you will be able to offer a better search page for the projects in your freelancer project theme . The extension is linked to the google maps and google geocoding APIs and allows your customers to search within a certain radius (miles or km) of a certain address or zip code. This feature is in particular very useful for the location based types of chore sites, where for example the user will need a chore/task done at a certain location, then the service providers or contractors can search through the jobs in their area only.
Also note that this extension is available in the PRO version and up of the project theme. You can find more pricing details here.