- If it is about technical aspects of Lightning Network then Development & Technical Discussion board should be used.
- If it is general information about LN such as LN stats, adoption by some company, any general news, etc. then Bitcoin Discussion board is suitable.
- If it is a problem with an LN client such as problems with installation, connecting to network, opening/closing channels, etc. then Bitcoin Technical Support or if it is a specific client like Electrum that has a dedicated board they should be used.
- If it is some sort of guide on LN such as how it works, how to use, what client to use, etc. then Beginners & Help board is the appropriate place.
- If it is a new project that either you made or know is being worked on such as a new LN client available on github and it doesn't already have a topic then Project Development is the board to use.
- Last but not least to complain about lack of LN board use Meta