It's a brand new, to the public, Project and it makes sense to limit the number of tasks per user so everyone gets some and not one person gets all of them and the rest of us get none. As the Admin said overtime they expect to up that to more tasks per pc. Look at the Project Ithena and how they are always having 'database full' messages because too many users are overwhelming the amount of space they have. They are working on it by increasing some of the task sizes but it will take time and probably money to fix the problem. MilkyWay limits the number of tasks a single user can get as well, it's not an uncommon thing, remember this is about the Science and one user crunching all the data can cause HUGE problems if their pc is not working correctly.

I've just joined Ithena, looks like the measurements project runs all the time, but there's no point in running it on more than one computer since it's checking your internet connection and they'd all get the same answer. The computation one I put on all of them, but that only has work every few weeks for 12 hours. The measurements one only has Linux tasks available just now, so I added it with a Virtualbox Linux. ROFL it warns you will be connecting to porn sites. Waits for police at door....

Its not really "checking" your internet connection. It is more "mapping" the route data is traveling between locations. And that route can actually change between cycles. There was another project called Dimes (non-BOINC) years ago that did essentially the same "science" but it was discontinued. Basically the same piece of data could travel infinite different paths to get to the same location. In theory they are supposed to take the shortest path but lines get congested, hardware over tasked or down, some re-routed intentionally for various reasons (including tracking), etc.. In theory they could take this data and make smarter devices/networks to make things more efficient.

Due to the peculiarities of using virtualization technology, the following approach is used:
one task per computer at a fixed point in time.
In the future, we plan to try an approach with two or more tasks per computer at a fixed point in time.

One task per BOINC client.

A PC can run more than 1 task at a time.

yes, with applications with 4Gio and 6Gio ram, it limits the number of wu.

It uses nowhere close to that and much less than some apps that aren't vbox. There should be no limit on number of tasks.

It makes me wonder what is going on in vbox that they are hiding and don't want more than 1 task running per PC.

I seem to be stuck on one task per account, not client. I attached 8 machines at once. All but one did something weird and claimed it couldn't contact the server, but continued to talk to it, asked twice, then got told off for last request too recent. One got a task, then since then the other hosts have just been told "got 0 new tasks" as though there's none available.

Yes I already mentioned that above.

They are banning hosts/clients. I also tried a 2nd client and it was banned.

I was not told I was banned, just no tasks available. The top contributor Mikey has more than one host running a task at once. So it must be possible.

Looks like some stupid Boinc bug, I get "Scheduler request to url failed: Couldn't resolve host name", which is absolute garbage. If the host name couldn't be resolved, how am I posting in here from the same computer? And how does Boinc immediately talk to the server it can't resolve?