Thanks .
It is in a qlistform. So would the first look up have a default value of yes to filter the second look up? And then create a third look up with the value set to no to display those values when needed?
Seems very cumbersome especially if the list you are trying to filter has more than two values.
Is there an enhancement request to provide filtering capabilities directly for a lookup? If so, please add me to it. If not, please create one. Thanks!