I could be doing something wrong, but I'm not sure what. I've tried...
S:blockIDBlacklist=Natura:redwood;Natura:redwood,1;Natura:redwood,2
...and...
S:blockIDBlacklist=Natura:redwood,0;Natura:redwood,1;Natura:redwood,2
...but either way the Natura Redwood trees still get treecapitated.

The outer "bark" block is just Natura:redwood. I don't think it's matching it properly?

Is there any other way to exclude Natura Redwood trees?

Did you ever get this to work?

I cannot seem to get it working either.