This feature is not implemented now. However, there is possible workaround that you can try to set tracked changes and comments to appear in different colors for different authors. But Word automatically picks which color represents each author—and that color might change when you reopen the document or someone else opens the document. About more details, you may refer the article.
Meanwhile, to get this feature more quickly, we recommend you give the feedback in Teams UserVoice. Many features of our current products are designed and upgraded based on customers’ feedback. With requirements like this increase, the problem may well be released in the future. Thanks for your understanding and support.
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