One FB Pixel per Offer/Audience?

Can I use 1 pixel for different offers aimed at different audiences or should I create different pixels for each?

For example, if I have an offer for plumbers, and another offer for project managers, should I create a different pixel for each respective audience?

I think you can use both options. Which one you choose depends on how you want to do it, but I guess having one beeper and collecting conversions in different events for different audiences is more preferable if we’re talking about the same site.