What are the full wildcard capabilities within Mapping Sets?

Summary:

Some of our SLA Account Rules contain about 10 rules within them, each one mapping to a constant based on a condition such as

"TRX_ATTR3" is >= 1000000 AND "TRX_ATTR3" is <= 1999999

Which translates to if the value selected in DFF Attribute 3 on an AR Invoice is between 1000000 - 1999999, then map to a specific value in a chart.

Rather than having a long list of rules within an Account Rule, we would rather convert this to a mapping set but are not sure if this is feasible. What we are currently wanting to do within the mapping set is say if TRX_ATTR3 starts with '10' then the output should be 16110 However, it does not appear that this is feasible.