I don't think it will be a problem, but the biggest thing I've noticed over the years supporting foxpro under citrix is that you need a command such as this:

getenv('NN') && nn = user name or machine name, something unique

Then you have to create a seperate folder for each 'NN'
This way, nothing overwrites somebody else's stuff and it doesnt matter what region, etc. that they are in because you can save their unique variables in their folder.

Only problem is when you get users sharing their log in, but thats a seperate issue.