There is no option in the JobRoller admin to disable the radius function, so this would require customization of the default theme on your part if you wanted to remove it. JobRoller also does not have a built in function to restrict job posting to specific locations as you describe, so this too would need to be customized into the theme. Thanks.
AppThemes does not offer customization services, however we do have a certified partners page where you can find developers for hire. If you make contact them directly with an outline of your requirements, they will be able to provide a quote. Thanks.
