Closest thing I found was placing a manually constructed string representing the multileg order into the Level II Trade grid in place of symbol.
EG: ".QQQ200731P272-2*.QQQ200731P266+.QQQ200731P260" For a 6-wide fly on QQQ.
However, the data presented seems a bit unreliable, as I can observe my orders from time to time, but sometimes they are not included even though my orders are within the ranges displayed.
Help desk at TOS was not helpful.