Its for the QATARISATION of the country.... which means Qataris in the work force.
A Filipino without work papers - doesn't really fit that criteria.
I worked at this a few years ago.
Here is the deal:
a. they may or may not let you in
b. the exhibitors won't be that interested in you

Nothing ventured - nothing gained - so give it a go but it is NOT aimed at recruiting non-Qataris