Light-Induced EPR (LEPR) study of magnetic, relaxation and dynamic parameters of spin charge carriers stabilized in polyaniline doped with toluenesulfonic acid (PANI:TSA), spin pairs of polarons and methanofullerene ion radicals photoinitiated in bulk heterojunctions formed by fullerene derivative, [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), with low-band-gap poly[2,7-(9,9-dioctylfluorene)-alt-4,7-bis(thiophen-2-yl)benzo-2,1,3-thiadiazole] (PFO-DBT) and poly[N-9'-heptadecanyl-2,7-carbazole-alt-5,5-(4',7'-di-2-thienyl-2',1',3'-benzothiadiazole)] (PCDTBT) copolymers as well as in respective PANI:TSA/PFO-DBT:PCBM and PANI:TSA/PCDTBT:PCBM composites are described. Magnetic resonance parameters of all charge carriers photoinitiated in these composites at wide temperature and photon energy regions were determined from deconvolution of LEPR spectra. The magnetic resonance, dynamics and recombination order of spin charge carriers were first shown to be governed by the structure and morphology of their polymer matrices as well as by the concentration and spatial distribution of spin traps reversible formed in composites under illumination. The concentration and energy depth of such traps are determined by the photon energy. These parameters can be additionally handled by the bringing into their bulk of a guest spin ensemble. Spin exchange interaction was shown to originate spin- and photon-correlate effective charge transfer in such multispin composite. Spin-assisted magnetic, relaxation and dynamics parameters of the PANI:TSA/PFO-DBT:PCBM and PANI:TSA/PCDTBT:PCBM multispin composites was interpreted in the framework of exchange of mobile spin pairs differently distributed in parental polymer matrices. An exchange interaction of localized guest and domestic spins with mobile spin pairs opens independent channels for precision controlling/handling their electronic properties for further creation of organic electronic and spintronic devices.