Yes, you can lock and unlock LFS files using file context menu. There's also the ability to see the list of locked files (and force-unlock one, if needed).
Excellent, thank you - I’m trialling it now. Loads of positive comments for your product on this thread. High quality paid native Mac software from smaller developers is one of my favourite things about the ecosystem.
Being honest, we don't use LFS internally, so dogfooding doesn't really work in this area. If you don't like something or you have an idea how we can improve LFS support in Fork, please feel free to contact me directly.