filtering infopath drop down using XSLT

[pods]

I have a drop down that I populate from a secondary data source. I want to
filter this list based on a value in a text box, using a "Search" button.
Unfortunately, I am limited to using XSLT to filter this list. Any ideas on
how to do that?

I am basically struggling with the XSLT.

Thanks,
R

 

[pods]

OK, let me refine my question. My XML looks like this:

<my:search_facilitator_group>
<my:user_lastname_filter>1</my:user_lastname_filter>
<my:facilitator_lastname_search></my:facilitator_lastname_search>
<my:user_firstname_filter>Equals</my:user_firstname_filter>
<my:facilitator_firstname_search></my:facilitator_firstname_search>
<my:user_country_filter>1</my:user_country_filter>
<my:facilitator_country_search></my:facilitator_country_search>
<my:facilitator_name_add></my:facilitator_name_add>
</my:search_facilitator_group>