EDIT: as you can see, the OP is now highlighted a bit more clearly, in 2021! But this may change, or someone might want a more striking contrast.
When the Original Poster of a question comments somewhere on the question page, his name is sort of highlighted:
Here it was Mitch (in case you didn't notice), who had asked for a female equivalent to guys on English.SE.
I can hardly spot the difference on my monitor; I've tried changing the contrast, but it remains very subtle. I often miss it.