How to compare a Collection against an Array for matches.

What I have is a text file with one line and values seperated by commas. This I dump into an Array. Then the second part of the script creates a collection of data that I For..Each through. What I would like to do is For Each member of my collection I want to see if it matches any elements that I have in the first array"arrServiceList". So lets say that one element of "arrServiceList" = TestGroup. Now at the bottom of my script I'm wanting to test each GRP to see if it is contained at all in "arrServiceList". I haven't worked with Arrays for a while so I forget this stuff. Points go to whoever produces workable code first. Just have it pop up a msgbox that says match if it finds any members in the array that match.

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Const ForReading = 1

Set objFSO = CreateObject("Scripting.FileSystemObject")

Set objTextFile = objFSO.OpenTextFile _
    ("c:\group.txt", ForReading)

Do Until objTextFile.AtEndOfStream
    strNextLine = objTextFile.Readline
    arrServiceList = Split(strNextLine , ",")
Loop

Set netObj = CreateObject("WScript.Network")

domain = netObj.UserDomain
user = netObj.UserName
      
Set userObj = GetObject("WinNT://" & domain & "/" & user & ",user")

For Each grp In userObj.Groups
   wscript.echo grp.name
Next
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