I don't think that selling sex for a living means that any relationship I get into has to be polyamorous

Forgive if that's implied. I don't think I've ever said a relationship had to be polyamorous, only that it could NOT be monogamous. Exclusionary, not inclusionary statement.

But please remember that for many of us, work sex is in a different category to personal life sex and so that might be why finding relationships that suit us is a complicated business.

It is for me too. But also consider that in the eyes of many guys, it's not.

I'm in that oft-criticized group of people who aren't sure they'd enjoy having a boyfriend who enjoyed knowing all about them screwing other men for cash!

I'm not sure whether that means you'd rather be single, or rather lie to your partner. I really can't condone the latter, honesty has always been my policy in life.

I know of plenty of escorts who plan to work happily for as long as they want, but who still have husbands or boyfriends who don't demand that he be allowed to shag all of Britain in exchange for her being such a big ol' slutty hobag, or whatever we're supposed to be that makes us not allowed to demand exactly what WE want in our own relationships!

Of course, I'm well aware that this is possible, and I personally can find such people relatively easily. As I said, BDSM sites are a good way of meeting openminded people who are generally more likely to be ok with this profession. I'd consider any specialist sexual interest such as that to be a better place for an escort to look for a partner, than in vanilla dating sites, or going out in clubs/bars etc, where you're exposed to the wide "normal" band of people who view sex work as icky/cheating/whatever and would be put off by it.

I just don't think you lose the right to say, "I enjoy some form of monogamy in my personal relationships" just because you do sex work,

Here is where we disagree, miss. I think you do. I also think the phrase "some form of monogamy" is an invalid one that makes no sense. To my mind, there is only one form of monogamy - a relationship only involving intimacy between two people. And sex work makes that impossible. I do believe this definition fits most accurately with the "normal"  view of it. A relationship where you work, and otherwise you and your partner are only intimate with each other, is certainly possible, and seems like what you're looking for. But I wouldn't call that monogamy.