Columbia is more standardized than Harvard or NYU in its graduate school requirements: most schools converge on WES ICAP. The key exception is Teachers College, which gives applicants a choice between WES, ECE, and TEC. Undergraduate admissions handles evaluation internally.
When applying to WES for Columbia, you select "U.S." for the application country, "Education" as the purpose, and "Graduate Admissions" for the level. You then add your specific Columbia school — SIPA, GSAS, or School of Professional Studies — as a recipient. You upload photocopies of your diploma/degree certificate and the English translation to WES, and your institution sends official documents directly to WES.
If you are applying to multiple Columbia graduate schools, one WES ICAP evaluation can serve all of them. Add each school as a recipient during the WES application.