The employer needs to know the complete address of the employee for a number of reasons. One is for payroll purposes. Setting up an account for a person requires him to provide his address. Another reason is that if something wrong happens, they would know where to locate him or his family. The company also needs an employees address so that they can be certain of his identity. And another reason would be for mailing of anything necessary purposes.
You should create a checklist of everything you need in your application form so a template can be found to match your needs. This will help you to find a form that will suit your needs. If you do not mind paying for a template for your application form, you can actually pay to have one created expressly for you that will match everything on your list and create the perfect form you need.