ACMS:
Speaking specifically about the A330, FCOM DSC-27-20-20-10 note (4) says that
"Bank angle limitation remains effective in ALT 1, which uses roll normal.
However, since ALT 1 is generally an unprotected law, all protection marks on the PFD are in amber for simplicity."
Even in ALT1 the amber marks for the Angle of Bank protection on the PFD will be amber, even though Angle of Bank protection is still available.
Thus as far as I know, there is no way to discern from the PFD whether you are in ALT1 or ALT2.