To clarify, do you need a manual page break (generally undesirable) or do
you need text on a new page. If the former, pressing Ctrl-Enter produces a
page break and I don't know if this works within an IF field but have no
reason to think it will not. Paragraph marks work (sort of) within IF
fields.

If you need text on a new page, format that text using paragraph formatting
of page break before and include that formatted text within your IF field.