1- Anal sex is not permitted in Islam. But only penetration of anus with penis is forbidden. The other sexual activity to related to Anus, like licking the area around anal sphincter with tongue as part of foreplay or rubbing it with penis on surface, is not forbidden.
2- Sex during periods is forbidden.
3- Oral sex is not forbidden but is deemed undesirable/disliked (makruh) by most of the scholars. There is no sin or punishment for it. Swallowing semen is deemed makruh as its spiritually impure. Some even say that its prohibited to swallow semen.
4- Sex with two or more wives at the same time and bed, is forbidden i.e threesome or foursome or five-some with your wives is not allowed in Islam.