How To Assign Client To Multiple Companies?

[velaware]

How would I assign a client to multiple companies?

 

I have them assigned to one company right now, is there a way though without manually running an SQL query to make them a part of multiple companies?  Or would they need to have two separate logins?

 

I just bought another company license so I'm not sure how this system works exactly.

[Michael]

They need another account on the other company.

[velaware]

They need another account on the other company.

That's what I thought after digging around the thought process a bit more.  Alright, easy pleasy and actually makes my needs a lot easier.  Thanks!