ASSOCIATION RULES WITH A PARTICULAR STRUCTURE

I’m interesting in extracting association rules with Knime. I would like to
extract rules with a precise stucture. I have a database table LOG with some
attributes a, b, c, d. I want only rules that have values of a and b in the
antecedent and c and d in the consequent.
For instance, I’m interesting in a rule like

a=“xxx” -> c=“yyy”

but I’m not interested in a rule like

d=“zzz” -> b=“ppp”.

Does anyone know if it is possible to get rule of this kind with Knime?

Thanks.