We can configure constraints to filter paths like following in AgileDesigner. But, Agile Requirements Designer (ARD) 2.6 cannot handle configured constraints properly.
In this sample, path of Large and Black is omitted as constraint. This configuration is saved using ARD 2.5.5.
So, the paths of full coverage should be 3. ARD 2.5.5 is expected behavior.
However, try to open such model using ARD 2.6, and then constraints are not shown.
And, constraints don't work properly. Large and Black path is not omitted.