Press and hold for (key)+(key) (like ctrl+c ctrl+v and other combinations)

[Tai Alt]

I't would be very nice to have a press and hold function.
Right now it's a guessing game when it coms to multiple key presses.
Is it possible to make this separation?

current output: "hello world [left-ctrl]zzzz"

ideal output (for me :D): "hello world {[left-ctrl]zz}zz"
alternative: "hello world {[left-ctrl]z}{[left-ctrl]z}zz"

[Tai Alt]

is this possible for Mac too (labels: enhancement, Windows version)