mIRC has no control over a) What Scoop Script does (how unfortunate, if only Khaled could prevent people using it) and b) What your IP/hostname is.
Scripts use fairly simple techniques to see that UserA and UserB have the same IP - scripts do what they are told to do, it cannot detect if you're in an Internet cafe or not, as far as the script is concerned you are a clone. If you want Scoop Script to stop detecting certain people as clones, you'll have to edit the script yourself - something we cannot do for you, or contact the author and ask them about it.
What feature were you suggesting for mIRC? And did I understand you correctly?