FreeForm: Limiting entries question

Hi,

I am trying to select just the latest freeform entry (easy) BUT I need the selection also to be limited to a particular value of the entries.

So should it work to something like below? is_user_message=”1”? is_user_message is a field in the forms.

{exp:freeform:entries is_user_message="1" orderby="entry_date" sort="desc" limit="1"}

I also need a way to limit selection to form names (easy) BUT I need to do something like:

{exp:freeform:entries form_name="form1|form2|form|3" orderby="entry_date" sort="desc" limit="1"}

Is that possible? Doesn’t seem to work for me.

Best, Sammi