I found that I can use the or character "|" in the Replace field to look for values found in the OCR data, but I can only have one result, so no matter what it finds it will always select the same option from the list in the metadata. This would never be of any use.

In order to use OCR data to determine the value to select in the metadata I need an activity that works like this. Or if this does not exist as a visual activity, I need to be able to write code directly like I can in workflow. This seems like a common QF need though, since without this ability you could never select metadata based on what is found in OCR.

switch(expression) {
  case x:
    Select This;
    break;
  case y:
    Select That;
    break;
  default:
    //ignore
}