Egg permissions?

Is there egg permissions, I don't want to give everyone build, but I want to let people donate in the form of eggs, by throwing them into a chicken egg machine.

There is not a permission to let people throw eggs.

I believe it is the use perm.

When I try to throw an egg into someone elses res (seeing how far I can throw an egg) it said that I needed build perms.

Well then that's the perm.

I don't exactly feel like adding build perms to everyone. why can't we have a diffrent perm for eggs as we do for buckets?

Here: Give people access to a dispenser with an access sign, let them fill it with eggs, and have it set up to a rapid redstone pulser, they load eggs in the dispenser and it dispenses them in the desired spot.
EDIT: This will also control egging in a single spot, so no egg griefing in places you don't want them..

+build
-destroy
-place
-bucket

They will be able to eggify, though. Not sure how you'd stop that.