using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text.RegularExpressions;
 
public class Test
{
	public static void Main()
	{
		var s = "local lvlr,lvll = Audiosource:GetLevel()";
    	var pattern = @"\blocal\s+(?:(?<vars>\w+),?\s*)+=";
    	var result = Regex.Matches(s, pattern)
    	          .Cast<Match>().Select(p => p.Groups["vars"].Captures)
    	          .ToList();
        foreach (var coll in result)
           foreach (var v in coll)
        	Console.WriteLine(v);
	}
}

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