Is there a way to blacklist a word in ONLY one channel?

Pretty simple. I don’t want to see a word, but I only don’t want to see it in one channel.
Example: I don’t want to see “harvest” in PlayHearthstone, but I don’t care if I see it in my own channel.

While we might consider this in the future (since we’ve planned to create a more sophisticated highlighting and blacklisting system), it’s not possible at this time.