You can configure JSU’s preconditions can be configured in several the following ways:
A result of a precondition can be negated
A result of a precondition can be combined with a Negate the precondition result
Combine the result with the result of previous preconditions using the following options:
Discard the result of the previous precondition (: Results of the previous preconditions are not taken into account)
AND (AND: All of the preconditions have to be true to allow execute a the post function)
OR (: Only one of the preconditions has to be true to allow execute a the post function)
...
Learn more in Workflow preconditions.