Title edited by Mod
Thanks for reaching out. I understand you are looking for an option to sync multiple cameras/faces to one computer. Am I correct?
I searched for this feature. I got to know that if you had multiple computers (each with their own webcam), their scene output could be combined into a single output via external application. There are some game streamers that do this, where they are in different cities, but they broadcast to twitch.tv as multiple characters.
On a single computer(and webcam), you can have multiple puppets in a scene but you can only control one at a time.
There is a other scenario where you can control multiple puppets if they are all armed but then they are all following the same movements of the single face being tracked in the webcam.
Hence, we can only track a single face at a time on a machine.
Are you after a live stream? If so as Shivangi said that is not supported. You need one computer and camera per person, then need software to merge the different video streams.
If a recorded video then it is easy. Arm the first puppet, make a recording in the timeline panel, then you can rewind the play head and the second person can make a recording by arming the second puppet.
If you do want it live, the only thing I can think of is to use replays. One character fully live and interactive. The second character you prerecord what they say and do. E.g. if the second puppet just says "yes!" "Really?" Or other simple statements. You can then use keyboard triggers to cause the second character replays to play at different times. Makes it a bit more interesting, but not fully interactive.
Sorry, if translating, be aware that "Replays" is a feature of Character animator. And by "Arm" I mean "enable" (the little red dot is on for recording). ("Arm" has two meanings in english.) Not sure how the translate software would work on special terms like that! 😉