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If I understand the question properly then the answer is no. Calibre's column icon and column coloring feature uses the template language, which can interrogate the metadata for the book in question, not other books that share metadata. In other words, the template language cannot answer the question "does some other book by this author have the XXX tag?"
That said, one of DaltonST's plugins might be able to help. They provide a large grab bag of features. I have no idea if one of them might be a way to express cross-book queries.
If you choose to go with adding information (the "tag"), I suggest that you dedicate a custom column to it. That way you don't pollute the tags with what is really administrative information. It also could make maintenance easier.
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