i don’t know about other religions but I’ll write what i know for sure. someone else can just add on to this answer.
Muslim men are supposed to keep the area from below their navels to their knees covered. they can wear caps. beards are sunnah (following example of our holy prophet PBUH.
Muslim women wear hijab. it does NOT HAVE to be black as some ppl assume. it should just cover the body (not reveal figure) bit apart form that it can be nice and decorated but should not attract the opposite sex.