Hi Akbob,
Welcome to the Roku Community.
There are some streaming channels in the Roku Channel Store that are only available to customers with a cable or satellite subscription, these are known as authenticated channels or TV Everywhere channels.
TV Everywhere channels are published by the cable/TV network and offer cable and satellite subscribers access to additional content on their Roku streaming player or Roku TV as part of their subscription.
If you are inquiring specifically on how to access the USA Network channel on your Roku device, you'll want to contact the channel provider support directly to inquire further for more information about that channel's features and functionality. Many channels on Roku are developed and maintained by the channel provider themselves.
We hope we have covered and answered your question. Please let us know if there is anything else we can assist you with.
Regards,
Nimfa