As of Red Carpet 2.0 you can use multiple servers for a single client. Each server is called a service, and is manipulated with the following commands:
Displays a list of services currently known to the client. Other commands that refer to services or take the --service= ( -s) option flag allow you to refer to these services by name, URL, or number.
Add a service. As an argument, provide the URL of the service. For example, rug add service https://my-server.com/data.
Delete a service. As an argument, use the name, number, or URL of the service you wish to delete.
If you use multiple servers, you must name them individually when performing server-specific actions, such as activation. Do so with the --service= flag:
rug activate --service=1 [key] [email@address]