In my CRM, there is a multiple-selection field "Association"

How do I search for everyone who has the field Association as Pacific Contractors Association, and then get that into Campaigns to send them an email campaign?

-- what I do not understand is that the campaigns does not tie into the crm.

-- I can find the records I want in the crm. Now how do I create a list of these for campaigns?

-- do I REALLY have to export my entire CRM and then sort it by hand in Excel and then import it into  Campaigns? That makes no sense