IWCA Views 7 meanings found IWCA serves as an umbrella for several international professional groups, including writing‑center associations, window‑cleaning trade bodies, wine‑club networks, wildfowl carving clubs, and an Irish wolfhound organization. Miscellaneous Irish Wolfhound Club of America, Inc. Iowa Wing Chun Association Community International Wildfowl Carvers Association Governmental Independent Working Class Association Business International Writing Centers Association International Window Cleaning Association International Wine Clubs Association