Are you talking about a fan with a Smart By Bond (SBB) compatible receiver included? Or the Universal retrofit kit for AC motor fans, such as the one sold at Home Depot?
As far as I’ve seen so far, none of those support more than 1 remote per receiver.
There are potentially some options to consider if you have a smart home controller that supports Z-Wave / WiFi / other kinds of remotes and can also integrate with Bond’s local network API.
For instance, I have integrations with Harmony remotes and 8-key wireless keypads that allow controlling Bond-based (and other) devices. Others have used RF or Z-Wave switches to do similar.
One of the useful threads: Is 2-way Communication Possible?