Here is what Rolland McCune says:
Preterition is supported by the following texts. First, Jude warns his readers that “certain persons have crept in unnoticed, those who were long beforehand marked out for this condemnation, ungodly persons who turn the grace of our God into licentiousness and deny our only Master and Lord, Jesus Christ” (Jude 4). The apostates are “marked out” for their condemnation. The best way to take prographo here is simply, to write beforehand, undoubtedly referring to previous prophecies and not to a divine decree of reprobation/damnation.
Rolland McCune, A Systematic Theology of Biblical Christianity, Vol. 3, p. 25.