How do i make it so a local script waits for a specific player and then does something to them?

I'm trying to make custom abilities for certain people but I don't know how to do this, please help

game.Players:WaitForChild("PlayerName")

Local script in StarterGui / StarterPlayer.StarterPlayersScripts / StarterPack ...

game.Players.LocalPlayer.CharacterAdded:Connect(function(Character)
	if Character.Name=='SwordsDestinyGames'or'name2'or'name3'then
		Character.Humanoid.WalkSpeed=100 -- example
	end
end)

local player = game.Players.LocalPlayer
local char = player.Character or CharacterAdded:wait()