Conditional User command

Howdy howdy. I'm trying to code a command that will give a different response based on who does it, for example mod 1 types in !hello and gets "Hi I hope you're doing well" response from nightbot. While mod 2 types !hello and gets "Good morning". Then if a person not listed tried the !hello command they would get a general response. I've been researching into it, but just curious if this is even possible at all with nightbots limitations. Thank you!