import psutil

def find_jobs_by_prefix(job_prefix):
    """
    Find all processes where the --job argument starts with a specific prefix.
    """
    matching_processes = []
    for proc in psutil.process_iter(['pid', 'cmdline']):
        try:
            cmdline = proc.info['cmdline']
            if '--job' in cmdline:
                # Find the value of the --job argument
                job_index = cmdline.index('--job') + 1
                job_value = cmdline[job_index]
                if job_value.startswith(job_prefix):
                    matching_processes.append(proc.info)
        except (psutil.NoSuchProcess, psutil.AccessDenied):
            continue
    return matching_processes