If the old TABLE BB-Code works properly within XenForo posts when the add-on is installed, but not within VaultWiki 4, then that is completely different than what I first gathered from your initial post (which was that there was not a direct conversion for a third-party vB TABLE code under XenForo, and that you wanted VaultWiki to be able to convert one third-party code to a completely different third-party code).
But if it's simply that a custom XenForo BB-Code (in this case TABLE) isn't parsing in wiki pages only, then that is probably a bug and I can look into it. If it parses normally in regular posts, but stops working when VaultWiki is enabled, then that is probably a bug and I can look into it.
Please clarify the symptoms.