Select-String to search only first column in .CSV

Hello all,
I'm wondering if anyone knows a way to only search the first column of a .CSV file using Select-String. I guess I could probably import-csv and pipe the first column to select-string, but I was wondering if Select-string has this capability within itself?

Yes, a "large file that I only need a few lines from" is more the issue. And I was also just curious if Select-String had such functionality. For the file I am reading, it has over 23,000 lines (13MB), and there is a significant
performance increase with using select-string (over %4000 increase) :
Using Import-CSV and Where-Object: around 5.938 seconds
Using Select-String: around 0.138 seconds
Thus, if I have several strings that I want to search the file for, I would prefer to use Select-String. I suppose I could just do the following?
1. Use Select-string to search the file for each string I need to search for
2. Once I'm done searching for all strings, I can query the resultant data set to be sure the string is in the first column of each record in the dataset
3. If the string is not in the first column in the resultant data set, I can just remove the record.
Am I way off base here?

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