The Render Node installations of Anima are free to use for everybody since version 5.6.0.
Therefore, no license management is required to render scenes with Anima content using version 6 or newer. Only creating scenes or adding new Anima content using the Workstation installation requires a license.
To learn more details about how to install and use the Render Node version of Anima, please read this article from the official Chaos Anima documentation.