If your network uses a proxy server, it could complicate the setup of ServiceCapture, but it does
NOT make it impossible.
By default ServiceCapture tries to auto-detect the presence of a proxy server. If you have manually configured a proxy server, ServiceCapture should have no problem detecting it and setting up what is known as a "Proxy Chain" between itself and that server. ServiceCapture is currently unable to detect proxy servers if they are configured using an "Automatic Configuration Script" or PAC files. In this case you need to change some configuration in ServiceCapture, for more details see
Configuring ServiceCapture with PAC files