PowerShell equivalent of LINQ SelectMany method

I'm writing PowerShell code to get all the local IPv4 addresses, excluding the loopback one. I need something like the LINQ SelectMany method, but I can't figure out how to do this with PS filters. This is the code I have so far, which works using a plain old ArrayList:

function Get-Computer-IP-Address()
{
    $ipAddresses = New-Object System.Collections.ArrayList

    $networkAdaptersWithIp = Get-WmiObject Win32_NetworkAdapterConfiguration | ? { $_.IPAddress -ne $null }
    foreach ($networkAdapter in $networkAdaptersWithIp)
    {
        foreach ($ipAddress in $networkAdapter.IPAddress)
        {
            if ($ipAddress -notlike "127.*" -and $ipAddress -notlike "*::*")
            {
                $ipAddresses.Add($ipAddress)
            }
        }
    }

    if ($ipAddresses.Length -eq 0)
    {
        throw "Failed to find any non-loopback IPv4 addresses"
    }

    return $ipAddresses
}

I'd like to know if there's a cleaner way to do it, with less code.