So what exactly is each one?
Say Alan and Betty are in a relationship, and Betty cheats on Alan with Charlie. Does the genre depend on which person you're playing as?
If you play as Alan, you're the person getting cheated on.
If you play as Betty, you're the person cheating.
If you play as Charlie, you're encouraging Betty to cheat with you.
Which genre is each situation?
If it's from Alan's POV, that's Netorare. If it is from Betty's POV, it's complicated. If it's from Charlie's POV, that's Netori. If it's from Alan's POV and he encourages Betty to cheat on him with Charlie, it's Netorase, whether she keeps loving Alan and stays with him or gets stolen away by Charlie entirely. So, that one doesn't really need a separate tag; "swinging" and "cuckold" already cover it.
I say "it's complicated" re: Betty's POV because those stories usually have a lot more story written for the relationship prior being one in which she is neglected and the one stealing them away is treating them right, so it comes across more as a netori-style story (since netori rarely involves scumbag characters, just because of authors' preferences, it seems), but there are also plenty where instead the FeMC gets raped and then stolen away in that manner, instead of being a willing participant, so in those cases it comes across more as a netorare-style story. Generally, if the partner being cheated on is shown as a victim, netorare; if they're shown as a scumbag, netori. As an example, I'll provide "Wild-shiki Nihonjin Tsuma no Netorikata Sono", or "Wild Method - How to Steal a Japanese Housewife". Just by the name alone it sounds like it'd be a netorare-style story, right? But when you actually read it, it comes across more as a netori-style story with some netorare flavouring (the husband comes off as a cold businessman who has no time for his wife, but they go about doing some scenes that would be right out of a netorare story, like fucking in the kitchen as the husband watches TV). So, yeah, it's complicated.