There are 2 ways OPS can treat this message:
1) As a normal message rule where you will have a rule executed 3 times
2) As a MLWTO message rule where OPS will keep all lines in one rule execution.
If you use the second method by including the keyword MLWTO in the header of the rule:
)MSG IEC3931I MLWTO
When this keyword is used, OPS generates variables with stems for each line. For example:
msg.text.1 variable will contain the first line of the message
msg.text.2 variable will contain the second line of the message
and so on if the message has more lines.
You can extract the jobname from the variable msg.text.3 variable in this case.