If you are already farming activity with accounts, you most likely have a proxy per farming account. You can use these proxies with the GaneshBot Captcha Harvester. To use them, start by opening the harvester.
Click on the + sign next to the Proxy field, as shown in the screenshot above. It will then ask you for a proxy name (so you know which one to select) and the proxy itself.
After inputting the name and the proxy address, press the Add Proxy button. This will add it to your list of proxies that you can harvest on. You can now select it in the Proxy drop down.