$ErrorActionPreference = "Stop"

$scriptBlk = {
  Write-Output "this is some output"
  Start-Sleep 5
  Write-Output "yup, yup"
}

$jobs = @()
$jobs += Start-Job $scriptBlk
$jobs += Start-Job $scriptBlk
$jobs += Start-Job $scriptBlk

function PrintJobWithData {
  param(
    [Parameter(Mandatory = $True, ValueFromPipeline = $True)]
    $job
  )
  if ($job.HasMoreData -eq "True") {
    Write-Output "--- Job $($job.Name)"
    $job | Receive-Job
  }
}

do {
  $jobstate = $jobs | Get-Job | Where-Object -Property State -eq "Running"
  $jobstate | Get-Job | % {$_ | PrintJobWithData}
  Start-Sleep 2
} while ($jobstate)

$jobs | Get-Job | % {$_ | PrintJobWithData}
$jobs | Remove-Job