The best way to achieve this in AssetAccountant is to set up classifications for each group of assets you want to get the individual journal out for and then select that for the assets.
That will give you a separate line item in your journals broken down by each classification.
Do journal entries post in summary or in detail asset-by-asset?
As you can see below, journals are posted by Asset Group, which avoids the possibility of having literally thousands and thousands of line items per journal posting if journals were posted per asset.
However AssetAccountant provides a clickable "Show details" link to show you the individual assets in detail that makes up the summary journal entries.
AssetAccountant also provides the option to post granular Clearing Account transactions to journals, to facilitate bank account reconciliations.