The question is a little vague, but, no, Aironet APs do not allow certificate assignment for their "local" (.i.e., built-in) RADIUS server.
They will pass the cert information to another external RADIUS and won't otherwise interfere with authorization using certificates between the clients/supplicants and the (external) RADIUS.
There is no facility for using certificates on the AP all by itself (LEAP and EAP-FAST, Username/Password only).
Good Luck
Scott
