hide blocked dimension from overview session

hi,
i need some help on how to hide blocked dimensions. for example dimension1 AAAAA in tfgld010 table is blocked for manual input and i need that AAAAA can't be used in all other sessions during zoom from parent session. something that works like query.extend.where in a ue program of the tfgld010 dal.
any suggestions that really work is very much appreciated.

thanks,
jojo