I created this filter for a table
lookupFILTER("Ordini",AND(OR(ISBLANK([_THISROW].[Tipologia]),IN([Tipologia]
,
[_THISROW].[Tipologia])),OR(ISBLANK([_THISROW].[Agenzia]),IN([Agenzia],[_THISROW].[Agenzia])),OR(ISBLANK([_THISROW].[Tipologia_Contratto_T...