That sounds more like a tenseless sentence than using a spacelike separation tense. Your friend’s performance of the task may well be in your future or past lightcone (or extend through both), but you don’t wish to imply any of these.
There are languages with tenseless verbs, as well as some with various types of spatial tense.
The closest I can approximate this in English without clumsy constructs is “I expect my friend does their task in such-and-such a way”, which I agree isn’t very satisfactory.
That sounds more like a tenseless sentence than using a spacelike separation tense. Your friend’s performance of the task may well be in your future or past lightcone (or extend through both), but you don’t wish to imply any of these.
There are languages with tenseless verbs, as well as some with various types of spatial tense.
The closest I can approximate this in English without clumsy constructs is “I expect my friend does their task in such-and-such a way”, which I agree isn’t very satisfactory.