There are many tools that could allow you to use a single camera on many different applications as there is no shortage of programs that can be installed on your mobile devices or even on your laptop or desktop computers which would allow you to socialize on the internet.
From Skype to Paltalk to a range of social media platforms that allow you to interact with other like minded individuals with your camera, you will find many options available however when you intend to use multiple such programs simultaneously then you would require a tool that would enable your camera to be used by multiple programs on a single device.
There are several such programs that you could install on your device and use a single camera on different applications at the same time and a good example of such a tool is manycam pro which you can do further reading about online through a range of different websites including video sharing platforms like YouTube.
You will however need to learn how to use manycam as is the case with any other software program that you choose to download to your device as there are specific ways that these devices or tools should be used. And the best thing being you can find information related to using manycam online from different websites.