To filter subprocess start by splitting parameter attributes or by its single values, set up subprocess call conditions.
When changing splitting parameter, subprocess call conditions will be changed:
If conditions were preset for the selected splitting parameter, they will be applied.
If conditions were not preset for the selected splitting parameter, the area will be empty.
To create and set up subprocess call conditions, use the Subprocess Call Filtering Settings dialog box:

To add a subprocess call condition, click the
Add button on the toolbar.
To delete one of conditions, select the condition and click the
Delete button on the toolbar.
To reorder conditions execution, select the
Up/
Down toolbar buttons.
To delete all conditions, click the Reset All Filters button.
To set up subprocess call conditions, set the following parameters:
Subprocess Parameter. Select a dictionary or dictionary attribute that will be used in condition.
Condition. Select a condition to compare subprocess parameter with the value in the drop-down list:
Equal
Not Equal.
Contains
Does not Contain.
Contained In.
Not Contained In
Not Crossed With.
NOTE. Displayed types depend on the attribute data type selected in the Subprocess Parameter column.
Value. Set process value or parameter that will be compared to subprocess parameter value.
And/Or. If several conditions are added, select one of logical statements in the drop-down list:
AND. Subprocesses satisfying all filtering conditions are started.
OR. It is used by default. Subprocesses satisfying one filtering condition are started. Conditions check is executed in serial mode.
If none of filtering conditions is satisfied, on executing the process the step finishes without starting subprocesses.
When executing a step in automatic mode subprocesses corresponding to filtering conditions are started:

When executing a step in manual mode, the Start Subprocesses dialog box opens where start parameters are values corresponding to filtering conditions:

If required, change start parameters values and click the Start button.
See also:
Creating the Subprocess Call Step | Executing Subprocess Steps