Hi,

If you just want to switch between different camera inputs, you can easily do it here:

And you set up the different inputs for CAM 1, CAM 2, CAM3,... here:

And If for example, you are doing virtual camera production with a green screen, then the billboards generated from the inputs above can be set to be visible from CAM 1, CAM 2, and CAM 3.

However, if you want to render and broadcast more than one virtual camera perspective (CAM 1, CAM 2,...) simultaneously, then you will need a multi-machine setup. And in this case, you should read this document: https://aximmetry.com/learn/virtual-production-workflow/preparation-of-the-production-environment-phase-i/multi-machine-environment/introduction-to-multi-machine-environment/
But first, you should decide what kind of virtual production are you going to have and read relevant documentation: https://aximmetry.com/learn/virtual-production-workflow/preparation-of-the-production-environment-phase-i/different-studios-for-virtual-production/introduction-to-different-studios-for-virtual-production/

Without a multi-machine setup, you can render one camera perspective because at once only one Unreal can run on one machine. Also, in general, you want to maximize the number of pixels you can render from one camera perspective, rendering more than one camera perspective per computer would significantly reduce the number of pixels you can render.

Warmest regards,