Hello @PGISSN,
With Livetable, I don’t have an easy answer in mind.
With Live Data it can get slightly easier.
For instance, the CSS below will highlight with a (questionable) red background all the rows corresponding to images.
#docAttachments table tr:has([data-title="Type"] [data-type="image/png"]) {
background-color: #f00;
}

For the rest, it depends on your use case as, for instance, CSS selectors currently do not allow for comparison operator (i.e., it’s currently not possible to select all rows with a file size larger than X bytes).