Powershell: Pass parameter or variable from outside workflow to the workflow

Question

I have a script that has a parameter. I use that parameter for multiple processes. After those processes are done I run a workflow so I can run other process in parallel. I then exit the workflow and run other processes. Is it possible to pass the parameter or variable from OUTSIDE the workflow into the workflow?

If I add the parameter $Group to the workflow the workflow fails. I've also tried $using:group and that doesn't work either.

If I remove $group from the computers.txt it works. I have this script running multiple times in a row so if I use a generic computers.txt it gets overwritten.

I don't expect that this is possible but I didn't know if anyone knew of any tricks.

param(     
	[Parameter()]     
	[string]$Group 
)

Get-ADGroupMember $Group | Select-Object name -ExpandProperty name | sort-object | out-file C:\Scripts\$Group-computers.txt

Do stuff

Workflow Updates {     
	ForEach -parallel ($computer in (get-content C:\Scripts\$Group-computers.txt)) {         
		InlineScript { Do other stuff}
Updates

Do even more stuff