Here is an example macro I made that gives you more of an idea of how arrays work and can be used.
Arrays Example (v9.0.1)
Keyboard Maestro Actions.kmactions (5.7 KB)
In practice, I would keep the information in a text file and either read it directly to use in the macro or read it into the variable %Variable%ClientInformationArrays%. The variables that are displayed in the window could be used any way you like. The point is that individual bits of information get extracted from the array, and these bits of information can be used as separate variables.