CPA bidding choosing conversion action

I created a display campaign recently using CPA bidding.
Unfortunately, I register all click outs (I have an affiliate website) as conversions.
That makes the campaign perform very poorly.

How could I do CPA bidding considering only one conversion action/type (e.g. lead registration or sale)? Is it possible?

For example I want that "Lead application submission" are the only conversion type taken into account for CPA bidding.
Or I want "Click to partner" conversions not taken into account...

CPA bidding choosing conversion action

Poster :