Improving Exclude List for Company Find Functionality

I'm using a "exclude" list to be used in the "Company find" function. This exclude list contains for example all our customers, so we don't target them. Unfortunately, I run into an issue that several companies use have multiple Linkedin Company URLs, so the exclusion doesn't work good enough yet. I currently have a "Company identifier" field which contains one "Linkedin URL" (or a domain, when the Linkedin is not available). Would it also be possibly to fill this field with multiple values? For example multiple "Linkedin URLs" and/or "domains".