Dunning form-Free selection issue

Hi All,

In tcode F150, we are giving 'free selection' values for BSID-XBLNR(reference).

Now we are adding one more field 'BKPF-AWTYP(reference transaction).

When we display dunning form, for each line it checks if both conditions are satisfied( BSID-XBLNR 'AND' BKPF-AWTYP).

Is it possible to modify filter criteria such that either one of the conditions is satisfied then print the corresponding line in form ( ie check BSID-XBLNR 'OR' BKPF-AWTYP).

Thanks in advance,

Greeshma.