I have a list of lookup values from Column I.
I have a set of different users from Cell A2:E2 but I want my output on G2 to show only Agent Joe since he is from my list of lookup values.
>Solution :
Use FILTER in TEXTJOIN to deal with multiple matches:
=TEXTJOIN(", ",TRUE,FILTER(A2:E2,ISNUMBER(MATCH(A2:E2,I:I,0))))

