SMW Table, only show results with a set value

Question

When i use a SMW table

{{#ask: [[Category:XY]]

 |?Referenzwert
 |format=table
 |limit=1000

}}

I only want to see the pages in the property "Referenzwert" that have the value 1.

Is that possible or do i need to create various properties that use the "allows value" special property?

I have not found any answers in the SMW documentation, neither the normal Mediawiki documentation.