Sorting or comparing IP addresses won't initially work because PowerShell uses alphanumeric comparison. However, you can compare or sort them correctly by casting IP addresses temporarily to the type System.Version:
$iplist = "10.10.10.1", "10.10.10.3", "10.10.10.230"
"Not sorted correctly:"
$iplist | Sort-Object
"Sorted correctly:"
$iplist |
ForEach-Object { [System.Version] $_ } |
Sort-Object |
ForEach-Object { $_.toString() }
