No nefilas apayim in selichos
This shiur explains that during Selichos, the Yud Gimel Midos Horachamim are not recited without a minyan. Additionally, nefilas apayim is not performed in Selichos.
Summary
Selichos prayers require a minyan for certain sections, such as the Yud Gimel Midos Horachamim, and nefilas apayim is omitted entirely during Selichos.