Feature summary (what you would like to be able to do and where):
When using Special:InvestigateBlock when blocking both IPs and accounts the blocks on IPs should be actually performed some time after or logged later in a method to be determined so that non-CUs looking at the block log for a CU cannot connect that IPs and users being blocked at the same time are from the same Special:InvestigateBlock usage.

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
When blocking IPs and accounts the blocks for IPs should be separated out from the blocks on the accounts so that non-CUs reviewing the block log of a CU cannot use that the accounts and IPs were blocked at the same time to correlate that the IPs and accounts were from the same results and thus related.

Benefits (why should this be implemented?):
This would help make using Special:InvestigateBlock for both IPs and accounts better as it would not make the link between the IPs and accounts as easy to view.

Things to discuss
The method to do this needs to be discussed as this will likely mean the block on the IPs being delayed in some manner, which for active abuse could be counterproductive.