You could create a ‘view’ that filters for you in the collaborator field? Assuming all tasks are in the same ‘table’ this would work - but I am not sure of what you mean by ‘sheet.’
If each employee has a separate table of tasks (versus a filtered view in one table for each employee) then you would need a filtered view in each table that filters for records in which you are the collaborator.
The only way to make a new ‘table’ that would show you all the records would be to link every single task in which you are the collaborator to a record or records in a separate table - which is not very friendly/or what I would recommend.