Project using the Bluesmirf Silver

I’d like to have a project that has a microcontroller and one BlueSmirf modem attached, and then have four wireless joysticks each with a BlueSmirf modem. Would one modem attached to a microcontroller be able to read input from all four wireless joysticks at the same time? Or would I need four Bluesmirf modems attached to the micrcontroller in order to do this?

Thanks.