You can post pics of a previously unshown set of figures elsewhere here and on the internet once the round concerned is over.
If you re-used the team in a later round of the LPL, it wouldn't get 'new team' bonus points anyway because it would already have been shown before - in the LPL!
There's no bar on a previously shown team being re-used in the LPL even if you have other images of the same figures elsewhere on the internet - although posts on other sites and social media of the 'here's my entry in a painting competition on LAF - go and vote for me' are clearly not allowed and would result in disqualification if seen / reported.