Named Search - Incoming Data

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Good afternoon,
I created a BAQ Named Search for the Quote/Line button lookup on the Sales Order Entry form (New Line From Quote). The BAQ returns a subset of all the quotes, allowing the user to choose the most relevant quote quickly.

I would like to filter my Named Search BAQ using the customer num or id that was previously entered on the Sales Order Form. Is this information passed along somehow to the BAQ powering the Named Search?
Thank you!
Nate