Only a natural person with the right to vote can make a contribution to a campaign, a PAC, party or political committee. No company, LLC, association, union, group, anything else other than an individual who has a right to vote can make a campaign contribution. Any corporation, legal entity, etc may make a statement under their free speech rights. No campaign contribution can be accepted at a place of work.
The elected officials are supposed to represent the people who can vote them in office, and no other entity.
Your local officials should accept written statements, in lieu of oral statements when demand is high. Those written statements should be entered into the official record of the meeting.