HI Daniel Pacheco,
If I understand you are trying to select multiple check box based on some criteria
so in htmlpath you need to find the dynamic parameter to select the appropriate check boc
for example lets assume that 1st field check box in row1 the dynamic valyue might be tr
and 2nd field check box might be tr to identify the second check box
In appl modeller you can select dynamic and in the navigattion stage once you drag and drop the element there will be 3 dots( elipsis) which is params, you need to open that and pass the whole html path combination of static value + dynamic value.
you can do combination of different things, 1st you can read the field name and if the filed name is what you are expecting then you can select the respective check box.