Set DPI of individual applications in Linux
The DPI is set within X (on a per monitor basis), and, I believe, not available to be set on an application basis. So, no.
A bit late to the party, but yes, you could do it with a trick.
#!/usr/bin/bash
OLDDPI=$(xrdb -query | awk '/Xft.dpi/ {print $2}')
xrdb -merge <(echo "Xft.dpi: 108")
$* & disown
sleep 3
xrdb -merge <(echo "Xft.dpi: $OLDDPI")
You can save this as a script, and whenever you need to change DPI of an application