You can play whatever you want to the extent your school and teacher allow it and to sufficient standard set by the school and appropriate for your level of achievement However The idea of these theme recitals generally is more appealing on paper vs enjoyable in person for the audience the exception being an audience of people with a keen interest in that genre Where i have seen success is at the graduate level usually a lecture recital format with slides discussion and study with compelling conclusions or unorthodox ideas supported with research being presented. Otherwise they generally drag on unless the composer had an incredibly varied style with huge swings in mood and type of music So do what you want or can, but realize limited impact is a distinct possibility or you should plan to prepare formal study and lecture to present some support some type of compelling conclusion about the music and or the composer