Move from Lithium Forum to wpForo
I'm sorry but wpForo doesn't have such option in Go2wpForo migration tool. We only recommend gConverter or ProfProjects services for such projects. They have already done hundreds of forum to wpForo migration projects with the best result.
In case you want to say thank you !)
We'd really appreciate and be thankful if you leave a good review on plugin page. This is the best way to say thank you to this project and support team.