That description of your problem looks like it's the output from an online translation program.
Are you trying to get only the rows of data from a CSV that have an asterisk ("*") in a certain column?
Here's an example of how to do that:
Import-Csv C:\Junk\SomeFile.csv |
Where-Object {$_.MyColumn -eq '*'} |
Export-Csv C:\Junk\OnlyAsterisks.csv -NoTypeInformation
If you would post the portion of your script that you're having a problem with it would be a good idea to post that. Use the "Code Sample" icon in the Format Bar to post the code. It's the 5th icon from the left, the one with the "101 010" image.