Inspired by a good question asked here that did not receive any serious answers.
Are there prohibitions (under mesirah or elsewhere) on turning over a fellow Jew to authorities other than the government, with the expectation that he may receive punishment other than the State's criminal penalties? For example, is one allowed to turn in a cheater to school authorities if doing so may result in his being kicked out of the school?
Related: Loshon hara vs. Honor code