How do I cite the live performance of a play presented as part of a group of plays?

If you are citing a play that was performed along with other plays in the same event, each of which has its own author, you should produce a works-cited-list entry for each play. Follow the MLA format template. The event itself can be considered the container of the play:

Castro, Cristina. May Yamoe. She Persists: The Great Divide III, 13 Mar. 2019, Pillsbury House Theatre, Chicago. 

As always, key your in-text citation for each play to the first element of the corresponding works-cited-list entry.