if you mean putting all your contacts, for a particular company in one folder or bunched up, then yes you can.
there are two, maybe three, ways:
1. when you enter your contacts in, you could type their company name in, then type a hyphen, then the name of the person (which is what i do for everyone in my company)
2. You could create a direct dial page for one of your home screens, granted you can only list 14 contacts, but you can make it your most important 14 (which is what i do and i list only those people above me)
3. you could create a folder on one of your home screens and place all the contacts you want in it so you can access just those numbers a little faster than scrolling through your contacts list