I am looking for a way to add a Comment to an individual post, rather than a reply to the whole topic?
Example: Topic Pizza
Reply
Reply
Reply
Comment to reply above not to whole topic
Reply
Reply
Thanks for any help
in short.... no.
We do not do threaded view...
threaded view is exclusionary and not encouraging to a wider conversational tone (which is what forums are, as opposed to blogs and social media timelines)
You could perhaps use an alternative if you really want it.
There is a Disqus mod available which does what you want in some way: http://custom.simplemachines.org/mods/index.php?mod=3211.