Process Limit
ProcessLimit is a sandbox setting in Sandboxie Ini available since v0.9.7 / 5.52.1. This setting allows you to limit the maximum number of processes that Sandboxie will allow in the sandbox at the same time.
Note: The start of new processes is delayed for 3 seconds when 80% of the set limit is reached. Once the limit is reached, no new process will be allowed to start (until another process is killed).
ProcessLimit is separate from ProcessNumberLimit. ProcessLimit is enforced by Sandboxie's process initialization logic, while ProcessNumberLimit uses the Windows Job Object active-process limit.