@kimcpa2000 You can, there is a beta option that allow you to associate a contact to multiple companies, you have to request it. The bad thing about it is that you will only see the main company associated with that contact and to see others you need to go through the details. But for filter/classification purposes it works great. Also, you will have to detail the rol of that contact in other associations, which is also a bit lame, because there are only 7 (I think) pre-defined roles.
Hopes this clarifies something to you.
All the best
Erik