\documentclass{article}
\usepackage[extrafootnotefeatures]{xepersian}
\settextfont[Language=Default]{Persian Modern}
\twocolumnfootnotes
\begin{document}
\LTRfootnote{Salam}\LTRfootnote{Salam}\LTRfootnote{Salam}\LTRfootnote{Salam}\LTRfootnote{Salam}
\LTRfootnote{Salam}
\end{document}