I think that you are talking about the shapes provided by the pgfornament package and you want to split one of these shapes into multiple shapes. You could do this via TikZ clip command, but you can also create your custom shapes from the existing ones.
If you look into the package code, you will see that all the shapes are stored as .pgf files with names such as vectorian.pgf which contain mysterious code. This code, however, is not that mysterious if you look into the pgfornament.sty file which explains how to read this code. In fact, the code is just a short form to express certain path descriptions.
Thus, you can easily create your own shapes from existing ones. In the following example, I create three new shapes, numbers 900, 901 and 902, from shape 80 by just deleting certain parts of the code of the original shape.
\documentclass{article}
\usepackage{pgfornament}
% shape vectorian 80 without middle dot (not used below)
\begin{filecontents}{vectorian900.pgf}
\m 163.6859 28.4848
\c 138.0308 28.4848 108.7226 16.2681 89.17 16.2681
\c 69.6292 16.2681 0 15.0762 0 15.0762
\c 0 15.0762 51.3042 12.6329 89.17 12.6329
\c 127.0417 12.6329 131.9344 0.4162 160.0208 0.4162
\c 188.1192 0.4162 196.6709 13.8247 196.6709 13.8247
\c 196.6709 13.8247 189.3469 28.4848 163.6859 28.4848
\o
\s
\m 364.3734 16.2681
\c 344.8207 16.2681 315.5066 28.4848 289.8575 28.4848
\c 264.2024 28.4848 256.8724 13.8247 256.8724 13.8247
\c 256.8724 13.8247 265.4241 0.4162 293.5225 0.4162
\c 321.609 0.4162 326.5016 12.6329 364.3734 12.6329
\c 402.2332 12.6329 453.5434 15.0762 453.5434 15.0762
\c 453.5434 15.0762 383.9142 16.2681 364.3734 16.2681
\o
\s
\endinput
\end{filecontents}
% shape vectorian 80 only left part
\begin{filecontents}{vectorian901.pgf}
\m 163.6859 28.4848
\c 138.0308 28.4848 108.7226 16.2681 89.17 16.2681
\c 69.6292 16.2681 0 15.0762 0 15.0762
\c 0 15.0762 51.3042 12.6329 89.17 12.6329
\c 127.0417 12.6329 131.9344 0.4162 160.0208 0.4162
\c 188.1192 0.4162 196.6709 13.8247 196.6709 13.8247
\c 196.6709 13.8247 189.3469 28.4848 163.6859 28.4848
\o
\s
\endinput
\end{filecontents}
% shape vectorian 80 only right part
\begin{filecontents}{vectorian902.pgf}
\m 364.3734 16.2681
\c 344.8207 16.2681 315.5066 28.4848 289.8575 28.4848
\c 264.2024 28.4848 256.8724 13.8247 256.8724 13.8247
\c 256.8724 13.8247 265.4241 0.4162 293.5225 0.4162
\c 321.609 0.4162 326.5016 12.6329 364.3734 12.6329
\c 402.2332 12.6329 453.5434 15.0762 453.5434 15.0762
\c 453.5434 15.0762 383.9142 16.2681 364.3734 16.2681
\o
\s
\endinput
\end{filecontents}
\begin{document}
\pgfornament[scale=0.2, ydelta=-2.75pt]{901}0 \pgfornament[scale=0.2, ydelta=-2.75pt]{902}
\end{document}

You can place these whereever you want, in footnotes but also in the page footer (which is what you mean, I assume).