[Ned]

1.В таблице - сделать дата метод.
2.У контрола - переписать лукап. Например:
SysTableLookup sysTableLookup = SysTableLookup::newParameters(tableNum(InventLocationGroupTable), this);
Query query = New Query();
QueryBuildDataSource queryBuildDataSource = query.addDataSource(tableNum(InventLocationGroupTable));
;

queryBuildDataSource.addRange(fieldNum(InventLocationGroupTable, InventLocationGroupId)).value(
InventLocationGroup.text());
sysTableLookup.addLookupfield(fieldNum(InventLocationGroupTable, InventLocationId));
sysTableLookup.addLookupfield(fieldNum(InventLocationGroupTable, InventLocationGroupId));
sysTableLookup.parmQuery(query);
sysTableLookup.performFormLookup();