[w0000t]

Storing the different information in the same place is impossible. You could use stenography but then anyone with access to the program/source will immediately discover the deceit.

You can use what hiq is suggesting, https://news.ycombinator.com/item?id=10097533, but that is a different method.

[7Z7]

I'm sure it was just a typo, but it's 'steganography'.

[w0000t]

Thank you. Yes, I meant steganography.