This is possible, yes. You can use a CopyTable action to copy a table or grid, and then use a Calculate in Javascript action to look through the table contents to look for specific data. While it is not exactly what you are trying to do, this blog - Creating a custom table in Personas - should give you enough detail about CopyTable and how to process the resulting copy to do what you need. There'll be a fair bit of Javascript in the final solution.
Steve.