Hi Gaymon,
You are trying to compare the value of the active field to a different field. This is not possible. The error does not describe this too well really. The calculation can only reference the field itself.
Not sure you can solve your problem via validation all together. it's more a problem i'd try to solve by changing the layout of the form itself. As that is not an option for you, i would recommend adding a tooltip to the field stating this is an address field.
The reason validation way is hard is because both Name and Address are free text fields and can have any format. You could probably say that an address requires a number of sort and a name field does not. (unless you are Prince of course!)
So you could probably use a regex which requires both letters and numbers to be entered and to enter a warning to say 'Enter a street address' (or whatever text you like.
have a search of the net to find any regex for street addressess.