Filter results in tablix, group filters and use AND/OR

Hi all

I'm not sure if it is possible to do what I am after or if it will even speed up processing my report but here goes, any help/advice appreciated.

I have added the following filters to a tablix,

ClientCategory1 is NC and VisibleId any of1, 4, 5, 8, 12, 17, 40, 45, 60

I would also like in addition to the above to add the below condition however I am not sure how to approach it.

VisibleId is ABS1 but ClientCategory1can be anything

I was thinking something like below, but I can't see where I would do that from the filters screen of the tablix properties within SSRS.

(ClientCategory1 = NC and VisibleId IN (1, 4, 5, 8, 12, 17, 40, 45, 60))
OR
(VisibleId = ABS1)

I currently do the above via multiple datasets but I thought it would make the report quicker by just using one dataset and then filtering the results per tablix if the above is possible.  This example is just for one department and we probably have another 8 departments so in total around 17/18 datasets. 

As mentioned any help/advice would really be appreciated, kind of hit a brick wall at the moment!

Cheers

Cheers Chris