Assignment

thanks for help,

No create a new role, but for this assignment, give the permission guest for the student that no have permission to submit a assignment. For the oders students, continualy with role student.
But this is no enough, cause is necessery define that students no appear in the grades. So, to soulve this problem, in option grades, in "exceptions notes", in this assignment, i remove the students that no have permission to submit the assignment, ie, create a exception for this assignment.