You should be able to do this, however, "you must be patient?" It's not a "fix my shiz" plug?
You have to track it in, let it here "your shiz?" and then find where the part you want to tune is? It's "tricky..." But you can do it. But it's not easy when shiz is all mixed up in a track. And in fact? You may need to do the best you can picking it out? And then mix it back in w/the original, but EQ the original to try to minimize the unwanted part, and mix it in "in places" with the pitch corrected part? (if there are parts it can't separate out?)
As I said, you can do it? But sometimes it's not easy... Sometimes it is though :-)