Did these effects exist before?

I don't know if it already existed and I was inattentive, but now I saw that in the effects it is possible to apply effects related to dice rolls, so I will ask:
Would it be possible to target the bonus or penalty to a specific skill?
Example: Instead of using skill: 10, you would use skill: Perception 10 and then when active you would have +10 in the perception roll and only perception, for example you can do the following:
Elf Ear; skill: Perception 10, roll
that is, I could know the bonus amount and it would only be for that skill, in that test only, to indicate that I am focusing on listening and not seeing something.

I put a sample of each of the effects that can be used in the modules so people would know about them. Unfortunately, specifying a specific skill doesn't work yet. I have to figure out how that is handled first.