It most certainly matters who it is addressed to. God addressed Noah to build snark. Have you built an ark? Why not? You realize those specific instructions are not to you. All throughout Scripture you need to ask, who is God addressing, and to whom does this apply?
A one off command to Moses
"Go. I am sending you to Pharaoh to bring my people out of Egypt"
A set of instructions for the whole community of Israelites to follow.
The 10 commandments.